diff --git a/build.gradle b/build.gradle
index 7459e7cb76..6537b84005 100644
--- a/build.gradle
+++ b/build.gradle
@@ -44,7 +44,7 @@ configure(allprojects) { project ->
 	ext.httpclientVersion    = "4.5"
 	ext.httpasyncVersion     = "4.1"
 	ext.jackson2Version      = "2.6.0"
-	ext.htmlunitVersion      = "2.17"
+	ext.htmlunitVersion      = "2.18"
 	ext.jasperreportsVersion = "6.1.0"
 	ext.javamailVersion      = "1.5.4"
 	ext.jettyVersion         = "9.3.1.v20150714"