diff --git a/.vscode/launch.json b/.vscode/launch.json
index 87e069a..69d7b44 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -8,7 +8,15 @@
       "protocol": "inspector",
       "cwd": "${workspaceRoot}",
       "program": "${workspaceFolder}/build/bw.js",
-      "args": ["login", "sdfsd@sdfdf.com", "ddddddd"]
+      "sourceMapPathOverrides": {
+        "meteor://💻app/*": "${workspaceFolder}/*",
+        "webpack:///./~/*": "${workspaceFolder}/node_modules/*",
+        "webpack://?:*/*": "${workspaceFolder}/*",
+        "webpack://@bitwarden/cli/*": "${workspaceFolder}/*"
+      },
+      "smartStep": true,
+      "console": "integratedTerminal",
+      "args": ["serve"]
     }
   ]
 }
diff --git a/package-lock.json b/package-lock.json
index 72bfa95..8824e1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,18 +9,22 @@
       "version": "1.20.0",
       "license": "GPL-3.0-only",
       "dependencies": {
+        "@koa/multer": "^3.0.0",
+        "@koa/router": "^10.1.1",
         "big-integer": "1.6.48",
         "browser-hrtime": "^1.1.8",
         "chalk": "^4.1.1",
         "commander": "7.2.0",
-        "express": "^4.17.1",
         "form-data": "4.0.0",
         "https-proxy-agent": "5.0.0",
         "inquirer": "8.0.0",
         "jsdom": "^16.5.3",
+        "koa": "^2.13.4",
+        "koa-bodyparser": "^4.3.0",
+        "koa-json": "^2.0.2",
         "lowdb": "1.0.0",
         "lunr": "^2.3.9",
-        "multer": "^1.4.3",
+        "multer": "^1.4.4",
         "node-fetch": "^2.6.1",
         "node-forge": "0.10.0",
         "open": "^8.0.8",
@@ -34,13 +38,16 @@
       },
       "devDependencies": {
         "@fluffy-spoon/substitute": "^1.208.0",
-        "@types/express": "^4.17.13",
         "@types/inquirer": "^7.3.1",
         "@types/jasmine": "^3.7.0",
         "@types/jsdom": "^16.2.10",
+        "@types/koa": "^2.13.4",
+        "@types/koa__multer": "^2.0.4",
+        "@types/koa__router": "^8.0.11",
+        "@types/koa-bodyparser": "^4.3.5",
+        "@types/koa-json": "^2.0.20",
         "@types/lowdb": "^1.0.10",
         "@types/lunr": "^2.3.3",
-        "@types/multer": "^1.4.7",
         "@types/node": "^16.11.12",
         "@types/node-fetch": "^2.5.10",
         "@types/node-forge": "^0.9.7",
@@ -56,7 +63,6 @@
         "jasmine-ts": "^0.4.0",
         "jasmine-ts-console-reporter": "^3.1.1",
         "lint-staged": "^12.1.3",
-        "nodemon": "^2.0.15",
         "pkg": "^5.5.1",
         "prettier": "^2.5.1",
         "rimraf": "^3.0.2",
@@ -241,6 +247,37 @@
         "url": "https://opencollective.com/substitute-js#section-contribute"
       }
     },
+    "node_modules/@koa/multer": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@koa/multer/-/multer-3.0.0.tgz",
+      "integrity": "sha512-y+OQBmex5D1jIl723gAEUYcAWPEicIXppaAKw/zCMfpllQ08ZNweDPwoCLxEoatqd5pCu2XG6V8dl67JRq3RJw==",
+      "engines": {
+        "node": ">= 8"
+      },
+      "peerDependencies": {
+        "multer": "*"
+      }
+    },
+    "node_modules/@koa/router": {
+      "version": "10.1.1",
+      "resolved": "https://registry.npmjs.org/@koa/router/-/router-10.1.1.tgz",
+      "integrity": "sha512-ORNjq5z4EmQPriKbR0ER3k4Gh7YGNhWDL7JBW+8wXDrHLbWYKYSJaOJ9aN06npF5tbTxe2JBOsurpJDAvjiXKw==",
+      "dependencies": {
+        "debug": "^4.1.1",
+        "http-errors": "^1.7.3",
+        "koa-compose": "^4.1.0",
+        "methods": "^1.1.2",
+        "path-to-regexp": "^6.1.0"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      }
+    },
+    "node_modules/@koa/router/node_modules/path-to-regexp": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-6.2.0.tgz",
+      "integrity": "sha512-f66KywYG6+43afgE/8j/GoiNyygk/bnoCbps++3ErRKsIYkGGupyv07R2Ok5m9i67Iqc+T2g1eAUGUPzWhYTyg=="
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -276,27 +313,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/@sindresorhus/is": {
-      "version": "0.14.0",
-      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
-      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/@szmarczak/http-timer": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
-      "integrity": "sha512-XIB2XbzHTN6ieIjfIMV9hlVcfPU26s2vafYWQcZHWXHOxiaRZYEDKEwdl129Zyg50+foYV2jCgtrqSA6qNuNSA==",
-      "dev": true,
-      "dependencies": {
-        "defer-to-connect": "^1.0.1"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/@tootallnate/once": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
@@ -329,6 +345,15 @@
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       "dev": true
     },
+    "node_modules/@types/accepts": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/@types/accepts/-/accepts-1.3.5.tgz",
+      "integrity": "sha512-jOdnI/3qTpHABjM5cx1Hc0sKsPoYCp+DP/GJRGtDlPd7fiV9oXGGIcjW/ZOxLIvjGz8MA+uMZI9metHlgqbgwQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/body-parser": {
       "version": "1.19.2",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.2.tgz",
@@ -348,6 +373,24 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/content-disposition": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/@types/content-disposition/-/content-disposition-0.5.4.tgz",
+      "integrity": "sha512-0mPF08jn9zYI0n0Q/Pnz7C4kThdSt+6LD4amsrYDDpgBfrVWa3TcCOxKX1zkGgYniGagRv8heN2cbh+CAn+uuQ==",
+      "dev": true
+    },
+    "node_modules/@types/cookies": {
+      "version": "0.7.7",
+      "resolved": "https://registry.npmjs.org/@types/cookies/-/cookies-0.7.7.tgz",
+      "integrity": "sha512-h7BcvPUogWbKCzBR2lY4oqaZbO3jXZksexYJVFvkrFeLgbZjQkU4x8pRq6eg2MHXQhY0McQdqmmsxRWlVAHooA==",
+      "dev": true,
+      "dependencies": {
+        "@types/connect": "*",
+        "@types/express": "*",
+        "@types/keygrip": "*",
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/eslint": {
       "version": "8.2.1",
       "resolved": "https://registry.npmjs.org/@types/eslint/-/eslint-8.2.1.tgz",
@@ -407,6 +450,18 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/http-assert": {
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/@types/http-assert/-/http-assert-1.5.3.tgz",
+      "integrity": "sha512-FyAOrDuQmBi8/or3ns4rwPno7/9tJTijVW6aQQjK02+kOQ8zmoNg2XJtAuQhvQcy1ASJq38wirX5//9J1EqoUA==",
+      "dev": true
+    },
+    "node_modules/@types/http-errors": {
+      "version": "1.8.2",
+      "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-1.8.2.tgz",
+      "integrity": "sha512-EqX+YQxINb+MeXaIqYDASb6U6FCHbWjkj4a1CKDBks3d/QiB2+PqBLyO72vLDgAO1wUI4O+9gweRcQK11bTL/w==",
+      "dev": true
+    },
     "node_modules/@types/inquirer": {
       "version": "7.3.2",
       "resolved": "https://registry.npmjs.org/@types/inquirer/-/inquirer-7.3.2.tgz",
@@ -446,6 +501,73 @@
       "integrity": "sha1-7ihweulOEdK4J7y+UnC86n8+ce4=",
       "dev": true
     },
+    "node_modules/@types/keygrip": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@types/keygrip/-/keygrip-1.0.2.tgz",
+      "integrity": "sha512-GJhpTepz2udxGexqos8wgaBx4I/zWIDPh/KOGEwAqtuGDkOUJu5eFvwmdBX4AmB8Odsr+9pHCQqiAqDL/yKMKw==",
+      "dev": true
+    },
+    "node_modules/@types/koa": {
+      "version": "2.13.4",
+      "resolved": "https://registry.npmjs.org/@types/koa/-/koa-2.13.4.tgz",
+      "integrity": "sha512-dfHYMfU+z/vKtQB7NUrthdAEiSvnLebvBjwHtfFmpZmB7em2N3WVQdHgnFq+xvyVgxW5jKDmjWfLD3lw4g4uTw==",
+      "dev": true,
+      "dependencies": {
+        "@types/accepts": "*",
+        "@types/content-disposition": "*",
+        "@types/cookies": "*",
+        "@types/http-assert": "*",
+        "@types/http-errors": "*",
+        "@types/keygrip": "*",
+        "@types/koa-compose": "*",
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/koa__multer": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/koa__multer/-/koa__multer-2.0.4.tgz",
+      "integrity": "sha512-WRkshXhE5rpYFUbbtAjyMhdOOSdbu1XX+2AQlRNM6AZtgxd0/WXMU4lrP7e9tk5HWVTWbx8DOOsVBmfHjSGJ4w==",
+      "dev": true,
+      "dependencies": {
+        "@types/koa": "*"
+      }
+    },
+    "node_modules/@types/koa__router": {
+      "version": "8.0.11",
+      "resolved": "https://registry.npmjs.org/@types/koa__router/-/koa__router-8.0.11.tgz",
+      "integrity": "sha512-WXgKWpBsbS14kzmzD9LeFapOIa678h7zvUHxDwXwSx4ETKXhXLVUAToX6jZ/U7EihM7qwyD9W/BZvB0MRu7MTQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/koa": "*"
+      }
+    },
+    "node_modules/@types/koa-bodyparser": {
+      "version": "4.3.5",
+      "resolved": "https://registry.npmjs.org/@types/koa-bodyparser/-/koa-bodyparser-4.3.5.tgz",
+      "integrity": "sha512-NRqqoTtt7cfdDk/KNo+EwCIKRuzPAu/wsaZ7tgIvSIBtNfxuZHYueaLoWdxX3ZftWavQv07NE46TcpyoZGqpgQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/koa": "*"
+      }
+    },
+    "node_modules/@types/koa-compose": {
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/@types/koa-compose/-/koa-compose-3.2.5.tgz",
+      "integrity": "sha512-B8nG/OoE1ORZqCkBVsup/AKcvjdgoHnfi4pZMn5UwAPCbhk/96xyv284eBYW8JlQbQ7zDmnpFr68I/40mFoIBQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/koa": "*"
+      }
+    },
+    "node_modules/@types/koa-json": {
+      "version": "2.0.20",
+      "resolved": "https://registry.npmjs.org/@types/koa-json/-/koa-json-2.0.20.tgz",
+      "integrity": "sha512-RuQ1Vlpsm/EC5wo2oWCgNnwneixnSQ9aHQAE7nwnbSiCibgfUO2wwSQN6rn8SfF97cRdN9hKAtoc9KSIuiGP6Q==",
+      "dev": true,
+      "dependencies": {
+        "@types/koa": "*"
+      }
+    },
     "node_modules/@types/lodash": {
       "version": "4.14.170",
       "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.170.tgz",
@@ -479,15 +601,6 @@
       "integrity": "sha512-1z8k4wzFnNjVK/tlxvrWuK5WMt6mydWWP7+zvH5eFep4oj+UkrfiJTRtjCeBXNpwaA/FYqqtb4/QS4ianFpIRA==",
       "dev": true
     },
-    "node_modules/@types/multer": {
-      "version": "1.4.7",
-      "resolved": "https://registry.npmjs.org/@types/multer/-/multer-1.4.7.tgz",
-      "integrity": "sha512-/SNsDidUFCvqqcWDwxv2feww/yqhNeTRL5CVoL3jU4Goc4kKEL10T7Eye65ZqPNi4HRx8sAEX59pV1aEH7drNA==",
-      "dev": true,
-      "dependencies": {
-        "@types/express": "*"
-      }
-    },
     "node_modules/@types/node": {
       "version": "16.11.12",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-16.11.12.tgz",
@@ -790,12 +903,6 @@
       "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.5.tgz",
       "integrity": "sha512-9IK9EadsbHo6jLWIpxpR6pL0sazTXV6+SQv25ZB+F7Bj9mJNaOc4nCRabwd5M/JwmUa8idz6Eci6eKfJryPs6Q=="
     },
-    "node_modules/abbrev": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
-      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
-      "dev": true
-    },
     "node_modules/accepts": {
       "version": "1.3.7",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
@@ -925,15 +1032,6 @@
         "ajv": "^8.8.2"
       }
     },
-    "node_modules/ansi-align": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-align/-/ansi-align-3.0.1.tgz",
-      "integrity": "sha512-IOfwwBF5iczOjp/WeY4YxyjqAFMQoZufdQWDd19SEExbVLNXqvpzSJ/M7Za4/sCPmQ0+GRquoA7bGcINcxew6w==",
-      "dev": true,
-      "dependencies": {
-        "string-width": "^4.1.0"
-      }
-    },
     "node_modules/ansi-escapes": {
       "version": "4.3.2",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.2.tgz",
@@ -970,19 +1068,6 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
-    "node_modules/anymatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.2.tgz",
-      "integrity": "sha512-P43ePfOAIupkguHUycrc4qJ9kz8ZiuOUijaETwX7THt0Y/GNK7v0aa8rY816xWjZ7rJdA5XdMcpVFTKMq+RvWg==",
-      "dev": true,
-      "dependencies": {
-        "normalize-path": "^3.0.0",
-        "picomatch": "^2.0.4"
-      },
-      "engines": {
-        "node": ">= 8"
-      }
-    },
     "node_modules/append-field": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
@@ -1049,11 +1134,6 @@
         "sprintf-js": "~1.0.2"
       }
     },
-    "node_modules/array-flatten": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
-    },
     "node_modules/array-union": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
@@ -1150,15 +1230,6 @@
         "node": "*"
       }
     },
-    "node_modules/binary-extensions": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
-      "integrity": "sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==",
-      "dev": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/bl": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
@@ -1170,73 +1241,6 @@
         "readable-stream": "^3.4.0"
       }
     },
-    "node_modules/body-parser": {
-      "version": "1.19.1",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.1.tgz",
-      "integrity": "sha512-8ljfQi5eBk8EJfECMrgqNGWPEY5jWP+1IzkzkGdFFEwFQZZyaZ21UqdaHktgiMlH0xLHqIFtE/u2OYE5dOtViA==",
-      "dependencies": {
-        "bytes": "3.1.1",
-        "content-type": "~1.0.4",
-        "debug": "2.6.9",
-        "depd": "~1.1.2",
-        "http-errors": "1.8.1",
-        "iconv-lite": "0.4.24",
-        "on-finished": "~2.3.0",
-        "qs": "6.9.6",
-        "raw-body": "2.4.2",
-        "type-is": "~1.6.18"
-      },
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
-    "node_modules/body-parser/node_modules/debug": {
-      "version": "2.6.9",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-      "dependencies": {
-        "ms": "2.0.0"
-      }
-    },
-    "node_modules/body-parser/node_modules/ms": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
-    },
-    "node_modules/boxen": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/boxen/-/boxen-5.1.2.tgz",
-      "integrity": "sha512-9gYgQKXx+1nP8mP7CzFyaUARhg7D3n1dF/FnErWmu9l6JvGpNUN278h0aSb+QjoiKSWG+iZ3uHrcqk0qrY9RQQ==",
-      "dev": true,
-      "dependencies": {
-        "ansi-align": "^3.0.0",
-        "camelcase": "^6.2.0",
-        "chalk": "^4.1.0",
-        "cli-boxes": "^2.2.1",
-        "string-width": "^4.2.2",
-        "type-fest": "^0.20.2",
-        "widest-line": "^3.1.0",
-        "wrap-ansi": "^7.0.0"
-      },
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/boxen/node_modules/type-fest": {
-      "version": "0.20.2",
-      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz",
-      "integrity": "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
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     "node_modules/brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -1371,58 +1375,16 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/cacheable-request": {
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-        "is-npm": "^5.0.0",
-        "is-yarn-global": "^0.3.0",
-        "latest-version": "^5.1.0",
-        "pupa": "^2.1.1",
-        "semver": "^7.3.4",
-        "semver-diff": "^3.1.1",
-        "xdg-basedir": "^4.0.0"
-      },
-      "dependencies": {
-        "semver": {
-          "version": "7.3.5",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.5.tgz",
-          "integrity": "sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==",
-          "dev": true,
-          "requires": {
-            "lru-cache": "^6.0.0"
-          }
-        }
-      }
-    },
     "uri-js": {
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
@@ -12237,25 +10979,11 @@
       "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
       "dev": true
     },
-    "url-parse-lax": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
-      "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
-      "dev": true,
-      "requires": {
-        "prepend-http": "^2.0.0"
-      }
-    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
-    "utils-merge": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
-      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
-    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
@@ -12461,15 +11189,6 @@
         "string-width": "^1.0.2 || 2 || 3 || 4"
       }
     },
-    "widest-line": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-3.1.0.tgz",
-      "integrity": "sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==",
-      "dev": true,
-      "requires": {
-        "string-width": "^4.0.0"
-      }
-    },
     "wildcard": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/wildcard/-/wildcard-2.0.0.tgz",
@@ -12498,30 +11217,12 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
-    "write-file-atomic": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
-      "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
-      "dev": true,
-      "requires": {
-        "imurmurhash": "^0.1.4",
-        "is-typedarray": "^1.0.0",
-        "signal-exit": "^3.0.2",
-        "typedarray-to-buffer": "^3.1.5"
-      }
-    },
     "ws": {
       "version": "7.5.1",
       "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.1.tgz",
       "integrity": "sha512-2c6faOUH/nhoQN6abwMloF7Iyl0ZS2E9HGtsiLrWn0zOOMWlhtDmdf/uihDt6jnuCxgtwGBNy6Onsoy2s2O2Ow==",
       "requires": {}
     },
-    "xdg-basedir": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-4.0.0.tgz",
-      "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==",
-      "dev": true
-    },
     "xml-name-validator": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
@@ -12576,6 +11277,11 @@
       "integrity": "sha512-y11nGElTIV+CT3Zv9t7VKl+Q3hTQoT9a1Qzezhhl6Rp21gJ/IVTW7Z3y9EWXhuUBC2Shnf+DX0antecpAwSP8w==",
       "dev": true
     },
+    "ylru": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ylru/-/ylru-1.2.1.tgz",
+      "integrity": "sha512-faQrqNMzcPCHGVC2aaOINk13K+aaBDUPjGWl0teOXywElLjyVAB6Oe2jj62jHYtwsU49jXhScYbvPENK+6zAvQ=="
+    },
     "yn": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
diff --git a/package.json b/package.json
index 83790c3..21dfb76 100644
--- a/package.json
+++ b/package.json
@@ -54,13 +54,16 @@
   },
   "devDependencies": {
     "@fluffy-spoon/substitute": "^1.208.0",
-    "@types/express": "^4.17.13",
     "@types/inquirer": "^7.3.1",
     "@types/jasmine": "^3.7.0",
     "@types/jsdom": "^16.2.10",
+    "@types/koa": "^2.13.4",
+    "@types/koa__multer": "^2.0.4",
+    "@types/koa__router": "^8.0.11",
+    "@types/koa-bodyparser": "^4.3.5",
+    "@types/koa-json": "^2.0.20",
     "@types/lowdb": "^1.0.10",
     "@types/lunr": "^2.3.3",
-    "@types/multer": "^1.4.7",
     "@types/node": "^16.11.12",
     "@types/node-fetch": "^2.5.10",
     "@types/node-forge": "^0.9.7",
@@ -91,18 +94,22 @@
     "webpack-node-externals": "^3.0.0"
   },
   "dependencies": {
+    "@koa/multer": "^3.0.0",
+    "@koa/router": "^10.1.1",
     "big-integer": "1.6.48",
     "browser-hrtime": "^1.1.8",
     "chalk": "^4.1.1",
     "commander": "7.2.0",
-    "express": "^4.17.1",
     "form-data": "4.0.0",
     "https-proxy-agent": "5.0.0",
     "inquirer": "8.0.0",
     "jsdom": "^16.5.3",
+    "koa": "^2.13.4",
+    "koa-bodyparser": "^4.3.0",
+    "koa-json": "^2.0.2",
     "lowdb": "1.0.0",
     "lunr": "^2.3.9",
-    "multer": "^1.4.3",
+    "multer": "^1.4.4",
     "node-fetch": "^2.6.1",
     "node-forge": "0.10.0",
     "open": "^8.0.8",
diff --git a/src/commands/serve.command.ts b/src/commands/serve.command.ts
index 9d692aa..f35853f 100644
--- a/src/commands/serve.command.ts
+++ b/src/commands/serve.command.ts
@@ -1,6 +1,9 @@
+import * as koaMulter from "@koa/multer";
+import * as koaRouter from "@koa/router";
 import * as program from "commander";
-import * as express from "express";
-import * as multer from "multer";
+import * as koa from "koa";
+import * as koaBodyParser from "koa-bodyparser";
+import * as koaJson from "koa-json";
 
 import { Main } from "../bw";
 
@@ -141,158 +144,211 @@ export class ServeCommand {
 
   async run(options: program.OptionValues) {
     const port = options.port || 8087;
-    const server = express();
+    const server = new koa();
+    const router = new koaRouter();
     process.env.BW_SERVE = "true";
     process.env.BW_NOINTERACTION = "true";
 
-    server.use(express.json());
-    server.use((req, res, next) => {
-      const sessionHeader = req.get("Session");
-      if (sessionHeader != null && sessionHeader !== "") {
-        process.env.BW_SESSION = sessionHeader;
-      }
-      next();
-    });
+    server
+      .use(koaBodyParser())
+      .use(koaJson({ pretty: false, param: "pretty" }))
+      .use(async (ctx, next) => {
+        const sessionHeader = ctx.request.get("Session");
+        if (sessionHeader != null && sessionHeader !== "") {
+          process.env.BW_SESSION = sessionHeader;
+        }
+        await next();
+      });
 
-    server.get("/generate", async (req, res) => {
-      const response = await this.generateCommand.run(req.query);
-      this.processResponse(res, response);
+    router.get("/generate", async (ctx, next) => {
+      const response = await this.generateCommand.run(ctx.request.query);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.get("/status", async (req, res) => {
+    router.get("/status", async (ctx, next) => {
       const response = await this.statusCommand.run();
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.get("/list/:object", async (req, res) => {
+    router.get("/list/:object", async (ctx, next) => {
       let response: Response = null;
-      if (req.params.object === "send") {
-        response = await this.sendListCommand.run(req.query);
+      if (ctx.params.object === "send") {
+        response = await this.sendListCommand.run(ctx.request.query);
       } else {
-        response = await this.listCommand.run(req.params.object, req.query);
+        response = await this.listCommand.run(ctx.params.object, ctx.request.query);
       }
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.get("/send/list", async (req, res) => {
-      const response = await this.sendListCommand.run(req.query);
-      this.processResponse(res, response);
+    router.get("/send/list", async (ctx, next) => {
+      const response = await this.sendListCommand.run(ctx.request.query);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/sync", async (req, res) => {
-      const response = await this.syncCommand.run(req.query);
-      this.processResponse(res, response);
+    router.post("/sync", async (ctx, next) => {
+      const response = await this.syncCommand.run(ctx.request.query);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/lock", async (req, res) => {
+    router.post("/lock", async (ctx, next) => {
       const response = await this.lockCommand.run();
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/unlock", async (req, res) => {
+    router.post("/unlock", async (ctx, next) => {
       const response = await this.unlockCommand.run(
-        req.body == null ? null : (req.body.password as string),
-        req.query
+        ctx.request.body.password == null ? null : (ctx.request.body.password as string),
+        ctx.request.query
       );
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/confirm/:object/:id", async (req, res) => {
-      const response = await this.confirmCommand.run(req.params.object, req.params.id, req.query);
-      this.processResponse(res, response);
+    router.post("/confirm/:object/:id", async (ctx, next) => {
+      const response = await this.confirmCommand.run(
+        ctx.params.object,
+        ctx.params.id,
+        ctx.request.query
+      );
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/restore/:object/:id", async (req, res) => {
-      const response = await this.restoreCommand.run(req.params.object, req.params.id);
-      this.processResponse(res, response);
+    router.post("/restore/:object/:id", async (ctx, next) => {
+      const response = await this.restoreCommand.run(ctx.params.object, ctx.params.id);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/move/:id/:organizationId", async (req, res) => {
+    router.post("/move/:id/:organizationId", async (ctx, next) => {
       const response = await this.shareCommand.run(
-        req.params.id,
-        req.params.organizationId,
-        req.body
+        ctx.params.id,
+        ctx.params.organizationId,
+        ctx.request.body // TODO: Check the format of this body for an array of collection ids
       );
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/attachment", multer().single("file"), async (req, res) => {
-      const response = await this.createCommand.run("attachment", req.body, req.query, {
-        fileBuffer: req.file.buffer,
-        fileName: req.file.originalname,
-      });
-      this.processResponse(res, response);
+    router.post("/attachment", koaMulter().single("file"), async (ctx, next) => {
+      const response = await this.createCommand.run(
+        "attachment",
+        ctx.request.body,
+        ctx.request.query,
+        {
+          fileBuffer: ctx.request.file.buffer,
+          fileName: ctx.request.file.originalname,
+        }
+      );
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/send/:id/remove-password", async (req, res) => {
-      const response = await this.sendRemovePasswordCommand.run(req.params.id);
-      this.processResponse(res, response);
+    router.post("/send/:id/remove-password", async (ctx, next) => {
+      const response = await this.sendRemovePasswordCommand.run(ctx.params.id);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.post("/:object", async (req, res) => {
+    router.post("/:object", async (ctx, next) => {
+      if (this.alreadyRespondedTo(ctx.response)) {
+        return;
+      }
       let response: Response = null;
-      if (req.params.object === "send") {
-        response = await this.sendCreateCommand.run(req.body, req.query);
+      if (ctx.params.object === "send") {
+        response = await this.sendCreateCommand.run(ctx.request.body, ctx.request.query);
       } else {
-        response = await this.createCommand.run(req.params.object, req.body, req.query);
+        response = await this.createCommand.run(
+          ctx.params.object,
+          ctx.request.body,
+          ctx.request.query
+        );
       }
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.put("/:object/:id", async (req, res) => {
+    router.put("/:object/:id", async (ctx, next) => {
+      if (this.alreadyRespondedTo(ctx.response)) {
+        return;
+      }
       let response: Response = null;
-      if (req.params.object === "send") {
-        req.body.id = req.params.id;
-        response = await this.sendEditCommand.run(req.body, req.query);
+      if (ctx.params.object === "send") {
+        ctx.request.body.id = ctx.params.id;
+        response = await this.sendEditCommand.run(ctx.request.body, ctx.request.query);
       } else {
         response = await this.editCommand.run(
-          req.params.object,
-          req.params.id,
-          req.body,
-          req.query
+          ctx.params.object,
+          ctx.params.id,
+          ctx.request.body,
+          ctx.request.query
         );
       }
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.get("/:object/:id", async (req, res) => {
+    router.get("/:object/:id", async (ctx, next) => {
+      if (this.alreadyRespondedTo(ctx.response)) {
+        return;
+      }
       let response: Response = null;
-      if (req.params.object === "send") {
-        response = await this.sendGetCommand.run(req.params.id, null);
+      if (ctx.params.object === "send") {
+        response = await this.sendGetCommand.run(ctx.params.id, null);
       } else {
-        response = await this.getCommand.run(req.params.object, req.params.id, req.query);
+        response = await this.getCommand.run(ctx.params.object, ctx.params.id, ctx.request.query);
       }
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.delete("/:object/:id", async (req, res) => {
+    router.delete("/:object/:id", async (ctx, next) => {
+      if (this.alreadyRespondedTo(ctx.response)) {
+        return;
+      }
       let response: Response = null;
-      if (req.params.object === "send") {
-        response = await this.sendDeleteCommand.run(req.params.id);
+      if (ctx.params.object === "send") {
+        response = await this.sendDeleteCommand.run(ctx.params.id);
       } else {
-        response = await this.deleteCommand.run(req.params.object, req.params.id, req.query);
+        response = await this.deleteCommand.run(
+          ctx.params.object,
+          ctx.params.id,
+          ctx.request.query
+        );
       }
-      this.processResponse(res, response);
+      this.processResponse(ctx.response, response);
+      await next();
     });
 
-    server.listen(port, () => {
-      this.main.logService.info("Listening on port " + port);
-    });
+    server
+      .use(router.routes())
+      .use(router.allowedMethods())
+      .listen(port, () => {
+        this.main.logService.info("Listening on port " + port);
+      });
   }
 
-  private processResponse(res: any, commandResponse: Response) {
+  private processResponse(res: koa.Response, commandResponse: Response) {
     if (!commandResponse.success) {
-      res.statusCode = 400;
+      res.status = 400;
     }
     if (commandResponse.data instanceof FileResponse) {
-      res.writeHead(200, {
-        "Content-Type": "application/octet-stream",
-        "Content-Disposition": "attachment;filename=" + commandResponse.data.fileName,
-        "Content-Length": commandResponse.data.data.length,
-      });
-      res.end(commandResponse.data.data);
+      res.body = commandResponse.data.data;
+      res.attachment(commandResponse.data.fileName);
+      res.set("Content-Type", "application/octet-stream");
+      res.set("Content-Length", commandResponse.data.data.length.toString());
     } else {
-      res.json(commandResponse);
+      res.body = commandResponse;
     }
   }
+
+  private alreadyRespondedTo(res: koa.Response) {
+    return res.body != null;
+  }
 }