diff --git a/build.gradle b/build.gradle
index a3421bb389b..6f034a192d3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -45,25 +45,25 @@ configure(allprojects) { project ->
 	ext.hibval4Version       = "4.3.2.Final"
 	ext.hibval5Version       = "5.2.2.Final"
 	ext.hsqldbVersion        = "2.3.3"
-	ext.httpclientVersion    = "4.5"
+	ext.htmlunitVersion      = "2.18"
 	ext.httpasyncVersion     = "4.1"
+	ext.httpclientVersion    = "4.5"
 	ext.jackson2Version      = "2.6.2"
-	ext.jsonassertVersion    = "1.2.3"
-	ext.jsonpathVersion      = "2.0.0"
-	ext.htmlunitVersion      = "2.18"
 	ext.jasperreportsVersion = "6.1.1"
 	ext.javamailVersion      = "1.5.4"
 	ext.jettyVersion         = "9.3.3.v20150827"
 	ext.jodaVersion          = "2.8.2"
-	ext.jrubyVersion         = "1.7.22"  // JRuby 9.0.0.0 only supported through JSR-223 (StandardScriptFactory)
+	ext.jrubyVersion         = "1.7.22"  // JRuby 9000 only supported through JSR-223 (StandardScriptFactory)
+	ext.jsonassertVersion    = "1.2.3"
+	ext.jsonpathVersion      = "2.0.0"
 	ext.jtaVersion           = "1.2"
 	ext.junitVersion         = "4.12"
-	ext.nettyVersion         = "4.0.31.Final"
+	ext.nettyVersion         = "4.0.32.Final"
 	ext.okhttpVersion        = "2.5.0"
 	ext.openjpaVersion       = "2.4.0"
-	ext.poiVersion           = "3.12"
+	ext.poiVersion           = "3.13"
 	ext.protobufVersion      = "2.6.1"
-	ext.reactorVersion       = "2.0.6.BUILD-SNAPSHOT"
+	ext.reactorVersion       = "2.0.6.RELEASE"
 	ext.romeVersion          = "1.5.1"
 	ext.seleniumVersion      = "2.47.1"
 	ext.slf4jVersion         = "1.7.12"
@@ -72,7 +72,7 @@ configure(allprojects) { project ->
 	ext.testngVersion        = "6.9.6"
 	ext.tiles2Version        = "2.2.2"
 	ext.tiles3Version        = "3.0.5"
-	ext.tomcatVersion        = "8.0.26"
+	ext.tomcatVersion        = "8.0.27"
 	ext.tyrusVersion         = "1.3.5"  // constrained by WebLogic 12.1.3 support
 	ext.undertowVersion      = "1.3.0.CR2"
 	ext.woodstoxVersion      = "5.0.1"
@@ -508,7 +508,7 @@ project("spring-messaging") {
 		optional("io.projectreactor:reactor-net:${reactorVersion}") {
 			exclude group: "io.netty", module: "netty-all"
 		}
-		optional "io.netty:netty-all:$nettyVersion"
+		optional("io.netty:netty-all:${nettyVersion}")
 		optional("org.eclipse.jetty.websocket:websocket-server:${jettyVersion}") {
 			exclude group: "javax.servlet", module: "javax.servlet-api"
 		}
@@ -913,7 +913,7 @@ project("spring-webmvc") {
 			exclude group: "org.slf4j", module: "jcl-over-slf4j"
 			exclude group: "org.springframework", module: "spring-web"
 		}
-		optional 'org.webjars:webjars-locator:0.28'
+		optional('org.webjars:webjars-locator:0.28')
 		testCompile(project(":spring-aop"))
 		testCompile("rhino:js:1.7R1")
 		testCompile("xmlunit:xmlunit:${xmlunitVersion}")