diff --git a/build.gradle b/build.gradle
index 351291a..cbef5c1 100755
--- a/build.gradle
+++ b/build.gradle
@@ -15,7 +15,7 @@ repositories {
 
 dependencies {
   // mandatory dependencies for using Spock
-  groovy "org.codehaus.groovy:groovy-all:2.0.5"
+  groovy "org.codehaus.groovy:groovy-all:2.1.5"
   testCompile "org.spockframework:spock-core:1.0-groovy-2.0-SNAPSHOT"
 
   // optional dependencies for using Spock
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 95e6e2e..b6b646b 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index bca5324..6da3ed6 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Sep 24 19:54:33 CEST 2012
+#Fri Jul 05 23:20:47 CEST 2013
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-1.2-bin.zip
+distributionUrl=http\://services.gradle.org/distributions/gradle-1.3-bin.zip
diff --git a/gradlew b/gradlew
index 3851082..91a7e26 100755
--- a/gradlew
+++ b/gradlew
@@ -61,9 +61,9 @@ while [ -h "$PRG" ] ; do
     fi
 done
 SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/"
+cd "`dirname \"$PRG\"`/" >&-
 APP_HOME="`pwd -P`"
-cd "$SAVED"
+cd "$SAVED" >&-
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
diff --git a/pom.xml b/pom.xml
index 57fb5ae..767933b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -46,7 +46,7 @@
           <dependency>
             <groupId>org.codehaus.groovy</groupId>
             <artifactId>groovy-all</artifactId>
-            <version>2.0.5</version>
+            <version>2.1.5</version>
           </dependency>
         </dependencies>
       </plugin>