diff --git a/pom.xml b/pom.xml
index b228574..e866c2d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,7 +48,7 @@
         <dependency>
             <groupId>org.spockframework</groupId>
             <artifactId>spock-core</artifactId>
-            <version>1.3-groovy-2.4</version>
+            <version>2.3-groovy-4.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>