diff --git a/build.gradle b/build.gradle
index 71fea3c089..fff2f6e1a9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -52,9 +52,9 @@ configure(allprojects) { project ->
 	ext.snifferVersion       = "1.11"
 	ext.tiles2Version        = "2.2.2"
 	ext.tiles3Version        = "3.0.5"
-	ext.tomcatVersion        = "8.0.15"
+	ext.tomcatVersion        = "8.0.18"
 	ext.tyrusVersion         = "1.3.5"  // constrained by WebLogic 12.1.3 support
-	ext.undertowVersion      = "1.1.1.Final"
+	ext.undertowVersion      = "1.1.2.Final"
 	ext.woodstoxVersion      = "4.4.1"
 	ext.xstreamVersion       = "1.4.7"