diff --git a/CHANGELOG.md b/CHANGELOG.md
index 614b9c87..4ab4f5fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+##
+## Added
+- support tiff format for inserting
+
 ## 9.3.1
 ## Changed
 - creating and editing pdf form
diff --git a/js/editor.js b/js/editor.js
index 087218c8..b7adc68c 100644
--- a/js/editor.js
+++ b/js/editor.js
@@ -343,7 +343,7 @@
     OCA.Onlyoffice.onRequestInsertImage = function (event) {
         var imageMimes = [
             "image/bmp", "image/x-bmp", "image/x-bitmap", "application/bmp",
-            "image/gif",
+            "image/gif", "image/tiff",
             "image/jpeg", "image/jpg", "application/jpg", "application/x-jpg",
             "image/png", "image/x-png", "application/png", "application/x-png"
         ];