diff --git a/build.gradle b/build.gradle
index b711d03123..7fb50c6cce 100644
--- a/build.gradle
+++ b/build.gradle
@@ -79,7 +79,7 @@ configure(allprojects) { project ->
 	ext.tiles3Version        = "3.0.5"
 	ext.tomcatVersion        = "8.0.32"
 	ext.tyrusVersion         = "1.3.5"  // constrained by WebLogic 12.1.3 support
-	ext.undertowVersion      = "1.3.17.Final"
+	ext.undertowVersion      = "1.3.18.Final"
 	ext.woodstoxVersion      = "5.0.1"
 	ext.xmlunitVersion       = "1.6"
 	ext.xstreamVersion       = "1.4.8"