diff --git a/gradle.properties b/gradle.properties
index b6c58f4..b2b677c 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,7 +3,7 @@ projectVersion=3.0.1-SNAPSHOT
 developers=Graeme Rocher
 grailsVersion=5.1.8
 grailsGradlePluginVersion=5.1.4
-groovyVersion=3.0.11
+groovyVersion=3.0.18
 gebSpock=5.1
 org.gradle.parallel=true
 org.gradle.caching=true