diff --git a/build.gradle b/build.gradle
index 66231ac..46a3710 100644
--- a/build.gradle
+++ b/build.gradle
@@ -45,11 +45,11 @@ repositories {
 }
 
 dependencies {
-    // NOTE: groovy version included in Jenkins is 1.8.9
-    runtime 'org.codehaus.groovy:groovy-all:1.8.9'
+    runtime 'org.codehaus.groovy:groovy-all:2.4.12'
+    compile 'org.codehaus.groovy:groovy-all:2.4.12'
     compile 'org.yaml:snakeyaml:1.26'
 
-    testCompile 'org.spockframework:spock-core:0.7-groovy-1.8'
+    testCompile 'org.spockframework:spock-core:1.0-groovy-2.4'
 
     jenkinsPlugins 'org.jenkins-ci.plugins:matrix-project:1.6@jar'
 }