diff --git a/build.gradle b/build.gradle
index 177580e..5f9e0cb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -71,7 +71,7 @@ subprojects {
 
         // Spock
         testImplementation(platform("org.spockframework:spock-bom:2.4-M4-groovy-4.0"))
-        testImplementation("org.apache.groovy:groovy:4.0.20")
+        testImplementation("org.apache.groovy:groovy:4.0.21")
         testImplementation("org.spockframework:spock-core")
         testImplementation("org.spockframework:spock-spring")
         testRuntimeOnly("net.bytebuddy:byte-buddy:1.14.13")