diff --git a/build.gradle b/build.gradle
index 403fbc3..6944617 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,7 +26,7 @@ dependencies {
     implementation gradleApi()
     implementation 'org.yaml:snakeyaml:2.3'
     testImplementation gradleTestKit()
-    testImplementation 'org.spockframework:spock-core:2.3-groovy-3.0'
+    testImplementation 'org.spockframework:spock-core:2.3-groovy-4.0'
 }
 
 test {