diff --git a/gitscord_webhook.php b/gitscord_webhook.php
index a61d454..636484b 100644
--- a/gitscord_webhook.php
+++ b/gitscord_webhook.php
@@ -41,35 +41,40 @@ if ($plainJSON != '') {
 	// process Gitlab data
 	$JSON = json_decode($plainJSON, true);
 	if (is_array($JSON)) { // valid JSON
-		switch ($JSON['object_kind']){ // type of event
-			case "push": // push event
-				$messageJSON = push_layout($messageJSON,$JSON,$lang,$mhl_color);
-				break;
-			case "tag_push":
-				$messageJSON = tag_layout($messageJSON,$JSON,$lang,$mhl_color);
-				break;
-			case "issue": // do the same weather its confidential or not
-			case "confidential_issue":
-				$messageJSON = issue_layout($messageJSON,$JSON,$lang,$mhl_color);
-				break;
-			case "note": // do the same weather its confidential or not
-			case "confidential_note":
-				$messageJSON = note_layout($messageJSON,$JSON,$lang,$mhl_color);
-				break;
-			case "merge_request":
-				// if somebody/somerole to hl, add him/it in the message
-				if ($configJSON['MR_manager'] != '') { $hl = " @".$configJSON['MR_manager']." "; }
-				else { $hl = ""; }
-				$messageJSON = MR_layout($messageJSON,$JSON,$lang,$hl,$mhl_color);
-				break;
-			case "job":
-				break;
-			case "pipeline":
-				break;
-			case "wiki_page":
-				break;
-			default:
-				send_error($url,"Unknown type of event");
+		if (isset($_SERVER['HTTP_X_GITLAB_EVENT'])) { // comming from a gitlab instance
+			switch ($JSON['object_kind']){ // type of event
+				case "push": // push event
+					$messageJSON = push_layout($messageJSON,$JSON,$lang,$mhl_color);
+					break;
+				case "tag_push":
+					$messageJSON = tag_layout($messageJSON,$JSON,$lang,$mhl_color);
+					break;
+				case "issue": // do the same weather its confidential or not
+				case "confidential_issue":
+					$messageJSON = issue_layout($messageJSON,$JSON,$lang,$mhl_color);
+					break;
+				case "note": // do the same weather its confidential or not
+				case "confidential_note":
+					$messageJSON = note_layout($messageJSON,$JSON,$lang,$mhl_color);
+					break;
+				case "merge_request":
+					// if somebody/somerole to hl, add him/it in the message
+					if ($configJSON['MR_manager'] != '') { $hl = " @".$configJSON['MR_manager']." "; }
+					else { $hl = ""; }
+					$messageJSON = MR_layout($messageJSON,$JSON,$lang,$hl,$mhl_color);
+					break;
+				case "job":
+					break;
+				case "pipeline":
+					break;
+				case "wiki_page":
+					break;
+				default:
+					send_error($url,"Unknown type of event");
+			}
+		}
+		else {
+			send_error($url,"Unknown git manager. Gitscord only support Gitlab.");
 		}
 		// sending post request to Discord
 		send_to_discord($url,$messageJSON);