diff --git a/seahub/settings.py b/seahub/settings.py
index 67b22a1997..49b05da232 100644
--- a/seahub/settings.py
+++ b/seahub/settings.py
@@ -287,7 +287,7 @@ AVATAR_DEFAULT_URL = '/avatars/default.png'
 AVATAR_DEFAULT_NON_REGISTERED_URL = '/avatars/default-non-register.jpg'
 AVATAR_MAX_AVATARS_PER_USER = 1
 AVATAR_CACHE_TIMEOUT = 14 * 24 * 60 * 60
-AUTO_GENERATE_AVATAR_SIZES = (16, 20, 24, 28, 32, 36, 40, 48, 60, 80, 290)
+AUTO_GENERATE_AVATAR_SIZES = (16, 20, 24, 28, 32, 36, 40, 48, 60, 64, 80, 290)
 # Group avatar
 GROUP_AVATAR_STORAGE_DIR = 'avatars/groups'
 GROUP_AVATAR_DEFAULT_URL = 'avatars/groups/default.png'
diff --git a/static/scripts/app/views/group-members.js b/static/scripts/app/views/group-members.js
index 9c047e4c67..1c0087cef5 100644
--- a/static/scripts/app/views/group-members.js
+++ b/static/scripts/app/views/group-members.js
@@ -66,7 +66,7 @@ define([
             this.collection.fetch({
                 cache: false,
                 reset: true,
-                data: {'avatar_size': 32},
+                data: {'avatar_size': 64},
                 success: function (collection, response, opts) {
                 },  
                 error: function (collection, response, opts) {