diff --git a/app.py b/app.py
index 31d9f1f..2c224cf 100755
--- a/app.py
+++ b/app.py
@@ -44,7 +44,7 @@
 static_img_path = "static/img/images/"
 temp_img_prefix = "MAX-"
 image_captions = collections.OrderedDict()
-VALID_EXT = ['png', 'jpg', 'jpeg', 'gif']
+VALID_EXT = ['png', 'jpg', 'jpeg']
 
 
 class MainHandler(web.RequestHandler):
diff --git a/static/js/webapp.js b/static/js/webapp.js
index 3f5cd87..f9f08c6 100644
--- a/static/js/webapp.js
+++ b/static/js/webapp.js
@@ -231,7 +231,7 @@ $(function() {
                     set_img_picker();
                 },
                 error: function() {
-                    alert("Must submit a valid file (png, jpeg, jpg, or gif)");
+                    alert("Must submit a valid file (png, jpeg, or jpg)");
                 },
                 complete: function() {
                     $("#file-submit").text("Submit");