diff --git a/build.gradle b/build.gradle
index 010391093a1..3cf6da0e34b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,7 +40,7 @@ configure(allprojects) { project ->
 	ext.aspectjVersion         = "1.9.0.BETA-5"
 	ext.beanvalVersion         = "1.1.0.Final"
 	ext.cacheApiVersion        = "1.0.0"
-	ext.caffeineVersion        = "2.5.1"
+	ext.caffeineVersion        = "2.5.2"
 	ext.eclipselinkVersion     = "2.6.4"
 	ext.ehcacheVersion         = "2.10.4"
 	ext.ehcachejcacheVersion   = "1.0.1"
@@ -59,7 +59,7 @@ configure(allprojects) { project ->
 	ext.httpclientVersion      = "4.5.3"
 	ext.interceptorApiVersion  = "1.2"
 	ext.jackson2Version        = "2.9.0.pr3"
-	ext.javamailVersion        = "1.6.0-rc1"
+	ext.javamailVersion        = "1.6.0-rc2"
 	ext.jaxbVersion            = "2.2.11"
 	ext.jaxwsVersion           = "2.2.11"
 	ext.jcaVersion             = "1.7"
@@ -94,7 +94,7 @@ configure(allprojects) { project ->
 	ext.tiles3Version          = "3.0.7"
 	ext.tomcatVersion          = "8.5.15"
 	ext.tyrusVersion           = "1.13.1"
-	ext.undertowVersion        = "1.4.15.Final"
+	ext.undertowVersion        = "1.4.16.Final"
 	ext.websocketVersion       = "1.1"
 	ext.woodstoxVersion        = "5.0.3"
 	ext.xmlunitVersion         = "2.3.0"