diff --git a/server/handlers/suggestions.js b/server/handlers/suggestions.js
index 7b64a2ea..ba87ef96 100644
--- a/server/handlers/suggestions.js
+++ b/server/handlers/suggestions.js
@@ -1,5 +1,23 @@
+function isUrl(str) {
+ 	var pattern = new RegExp("\\b(((ht|f)tp(s?)\\:\\/\\/|~\\/|\\/)|www.)" +
+    	"(\\w+:\\w+@)?(([-\\w]+\\.)+(com|org|net|gov" +
+    	"|mil|biz|info|mobi|name|aero|jobs|museum" +
+    	"|travel|[a-z]{2}))(:[\\d]{1,5})?" +
+		"(((\\/([-\\w~!$+|.,=]|%[a-f\\d]{2})+)+|\\/)+|\\?|#)?" +
+		"((\\?([-\\w~!$+|.,*:]|%[a-f\\d{2}])+=?" +
+		"([-\\w~!$+|.,*:=]|%[a-f\\d]{2})*)" +
+		"(&(?:[-\\w~!$+|.,*:]|%[a-f\\d{2}])+=?" +
+		"([-\\w~!$+|.,*:=]|%[a-f\\d]{2})*)*)*" +
+		"(#([-\\w~!$+|.,*:=]|%[a-f\\d]{2})*)?\\b");
+  	if(!pattern.test(str)) {
+    	return false;
+  	} else {
+    	return true;
+  	}
+}
+
 function thumbnail(msg, coll, guid, offline, socket) {
-    if(msg.thumbnail != undefined && msg.channel && msg.channel != undefined){
+    if(msg.thumbnail != undefined && msg.channel && msg.channel != undefined && isUrl(msg.thumbnail)){
         if(typeof(msg.channel) != "string" || typeof(msg.thumbnail) != "string")
              {
                 var result = {
diff --git a/server/public/assets/js/functions.js b/server/public/assets/js/functions.js
index 41f62678..8d155fd3 100644
--- a/server/public/assets/js/functions.js
+++ b/server/public/assets/js/functions.js
@@ -708,7 +708,7 @@ function toast(msg) {
             break;
         case "thumbnail_denied":
             if(embed) return;
-            msg = "The thumbnail will be denied";
+            msg = "The thumbnail is not an url..";
             break;
         case "description_denied":
             if(embed) return;