diff --git a/ocpp-v1_6-test/build.gradle b/ocpp-v1_6-test/build.gradle
index 911210bd..51a7c468 100644
--- a/ocpp-v1_6-test/build.gradle
+++ b/ocpp-v1_6-test/build.gradle
@@ -12,7 +12,7 @@ dependencies {
 
     testCompile 'junit:junit:4.13.2'
     testCompile 'org.codehaus.groovy:groovy-all:3.0.25'
-    testCompile 'org.spockframework:spock-core:2.3-groovy-3.0'
+    testCompile 'org.spockframework:spock-core:2.4-groovy-5.0'
     testCompile 'org.hamcrest:hamcrest-core:3.0'
     testCompile 'ch.qos.logback:logback-core:1.3.16'
     testCompile 'ch.qos.logback:logback-classic:1.3.16'