diff --git a/build.gradle b/build.gradle
index 0364cb1..78ad6e6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -43,8 +43,8 @@ dependencies {
     bundledLibs 'com.google.code.gson:gson:2.10'
     bundledLibs 'com.rabbitmq:amqp-client:5.16.0'
 
-    testImplementation 'org.apache.groovy:groovy:4.0.6'
-    testImplementation 'org.apache.groovy:groovy-dateutil:4.0.6'
+    testImplementation 'org.apache.groovy:groovy:4.0.21'
+    testImplementation 'org.apache.groovy:groovy-dateutil:4.0.21'
     testImplementation 'org.spockframework:spock-core:2.3-groovy-4.0'
     testImplementation 'org.junit.platform:junit-platform-engine:1.9.1'
     testImplementation "org.odpi.egeria:repository-services-implementation:${egeriaVersion}"