diff --git a/dev/js/src/api.js b/dev/js/src/api.js
index 80391d8..3b3b821 100644
--- a/dev/js/src/api.js
+++ b/dev/js/src/api.js
@@ -169,10 +169,16 @@
             return;
           };
 
-          if (retJSObj !== undefined && retJSObj["errors"] !== undefined) {
-            retJSObj["errors"].forEach(
-              e => KorAP.log(e[0], e[1] || "Unknown")
-            );
+          if (retJSObj !== undefined) {
+            if (retJSObj["errors"] !== undefined) {
+              retJSObj["errors"].forEach(
+                e => KorAP.log(e[0], e[1] || "Unknown")
+              );
+            } else if (retJSObj["warnings"] !== undefined) {
+              retJSObj["warnings"].forEach(
+                e => KorAP.log(e[0], e[1] || "Unknown", null, 'warn')
+              );
+            }
           }
 
           else if (this.status !== 200) {
diff --git a/dev/js/src/init.js b/dev/js/src/init.js
index 6243bc7..6e6b4f1 100644
--- a/dev/js/src/init.js
+++ b/dev/js/src/init.js
@@ -56,7 +56,7 @@
 
   // Override KorAP.log
   window.alertify = alertifyClass;
-  KorAP.log = function (code, msg, src) {
+  KorAP.log = function (code, msg, src, type) {
 
     if (src) {
       msg += '<code class="src">'+src+'</code>';
@@ -66,7 +66,7 @@
     alertifyClass.log(
       (code === 0 ? '' : code + ': ') +
         msg,
-      'error',
+      (type ? type : 'error'),
       10000
     );
   };