diff --git a/build.gradle b/build.gradle
index 05d56c046c..0d58505797 100644
--- a/build.gradle
+++ b/build.gradle
@@ -43,12 +43,12 @@ configure(allprojects) { project ->
 	ext.hsqldbVersion        = "2.3.2"
 	ext.httpclientVersion    = "4.5"
 	ext.httpasyncVersion     = "4.1"
-	ext.jackson2Version      = "2.6.0-rc2"  // to be upgraded to 2.6 final in time for Spring Framework 4.2 GA
+	ext.jackson2Version      = "2.6.0-rc3"  // to be upgraded to 2.6 final in time for Spring Framework 4.2 GA
 	ext.jasperreportsVersion = "6.1.0"
-	ext.javamailVersion      = "1.5.3"
+	ext.javamailVersion      = "1.5.4"
 	ext.jettyVersion         = "9.3.0.v20150612"
 	ext.jodaVersion          = "2.8.1"
-	ext.jrubyVersion         = "1.7.20"
+	ext.jrubyVersion         = "1.7.20.1"
 	ext.jtaVersion           = "1.2"
 	ext.junitVersion         = "4.12"
 	ext.nettyVersion         = "4.0.29.Final"