diff --git a/dev/js/src/vc/rewrite.js b/dev/js/src/vc/rewrite.js
index f0dfe34..bd29b9f 100644
--- a/dev/js/src/vc/rewrite.js
+++ b/dev/js/src/vc/rewrite.js
@@ -3,7 +3,7 @@
  */
 define(['vc/jsonld', 'util'], function (jsonldClass) {
 
-  var _validRewriteOpRE   = new RegExp("^(?:injec|modifica)tion$");
+  var _validRewriteOpRE   = new RegExp("^(operation:)?(?:injec|modifica)tion$");
 
   return {
     // Construction method
@@ -28,8 +28,8 @@
 	if (_validRewriteOpRE.test(op)) {
 	  this._op = op;
 	}
-	else {
-	  KorAP.log(814, "Unknown rewrite operation");
+	      else {
+	        KorAP.log(814, "Unknown rewrite operation");
 	  return;
 	};
       };
diff --git a/kalamar.conf b/kalamar.conf
index 99e16e2..912aca9 100644
--- a/kalamar.conf
+++ b/kalamar.conf
@@ -11,7 +11,7 @@
   },
   Kalamar => {
     api => $ENV{'KALAMAR_API'} // $api,
-    auth_support => 0
+    auth_support => 1
   },
   CHI => {
     default => {