diff --git a/build.gradle b/build.gradle
index c16e238..30585f1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,7 +16,7 @@ repositories {
 
 dependencies {
     testImplementation group: 'junit', name: 'junit', version: '4.13.2'
-    testImplementation ('org.spockframework:spock-core:2.1-groovy-3.0') {
+    testImplementation ('org.spockframework:spock-core:2.3-groovy-4.0') {
         exclude group:'org.codehaus.groovy'
     }
 }