diff --git a/modules/core/String.js b/modules/core/String.js
index d1b1090d..1dacce10 100644
--- a/modules/core/String.js
+++ b/modules/core/String.js
@@ -394,7 +394,7 @@ String.prototype.unwrap = function(removeTags, replacement) {
  * @return String md5 hash of the string
  */
 String.prototype.md5 = function() {
-    return Packages.helma.util.MD5Encoder.encode(this);
+    return Packages.org.apache.commons.codec.digest.DigestUtils.md5Hex(this);
 };
 
 
diff --git a/modules/helmaTools.zip b/modules/helmaTools.zip
new file mode 100644
index 00000000..4eee14a0
Binary files /dev/null and b/modules/helmaTools.zip differ