diff --git a/build.gradle b/build.gradle
index f21180d..65d8d6b 100755
--- a/build.gradle
+++ b/build.gradle
@@ -15,12 +15,12 @@ repositories {
 
 dependencies {
   // mandatory dependencies for using Spock
-  compile "org.codehaus.groovy:groovy-all:2.4.1"
-  testCompile "org.spockframework:spock-core:1.1-groovy-2.4-rc-3"
+  compile "org.codehaus.groovy:groovy-all:2.4.10"
+  testCompile "org.spockframework:spock-core:1.1-groovy-2.4"
 
   // optional dependencies for using Spock
   testCompile "org.hamcrest:hamcrest-core:1.3" // only necessary if Hamcrest matchers are used
-  testRuntime "cglib:cglib-nodep:3.2.4"          // allows mocking of classes (in addition to interfaces)
+  testRuntime "net.bytebuddy:byte-buddy:1.6.5"          // allows mocking of classes (in addition to interfaces)
   testRuntime "org.objenesis:objenesis:2.5.1"    // allows mocking of classes without default constructor (together with CGLIB)
 
   // dependencies used by examples in this project
diff --git a/pom.xml b/pom.xml
index df740b7..a57cd6d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -59,19 +59,19 @@
     <dependency>
       <groupId>org.spockframework</groupId>
       <artifactId>spock-core</artifactId>
-      <version>1.1-groovy-2.4-rc-3</version>
+      <version>1.1-groovy-2.4</version>
       <scope>test</scope>
     </dependency>
     <!-- Optional dependencies for using Spock -->
     <dependency> <!-- use a specific Groovy version rather than the one specified by spock-core -->
       <groupId>org.codehaus.groovy</groupId>
       <artifactId>groovy-all</artifactId>
-      <version>2.4.7</version>
+      <version>2.4.10</version>
     </dependency>
     <dependency> <!-- enables mocking of classes (in addition to interfaces) -->
-      <groupId>cglib</groupId>
-      <artifactId>cglib-nodep</artifactId>
-      <version>3.2.4</version>
+      <groupId>net.bytebuddy</groupId>
+      <artifactId>byte-buddy</artifactId>
+      <version>1.6.5</version>
       <scope>test</scope>
     </dependency>
     <dependency> <!-- enables mocking of classes without default constructor (together with CGLIB) -->