diff --git a/pom.xml b/pom.xml
index 87deb00..504e4ac 100644
--- a/pom.xml
+++ b/pom.xml
@@ -111,7 +111,7 @@
         <!-- Dependency versions -->
         <cglib.version>3.2.5</cglib.version>
         <dokka.version>0.9.17</dokka.version>
-        <groovy.version>2.4.15</groovy.version>
+        <groovy.version>2.4.21</groovy.version>
         <jaxb.version>2.3.1</jaxb.version>
         <juel.version>2.2.7</juel.version>
         <junit.version>5.4.1</junit.version>