diff --git a/apps/member/views.py b/apps/member/views.py
index 870079cc..d4bbc592 100644
--- a/apps/member/views.py
+++ b/apps/member/views.py
@@ -238,17 +238,18 @@ class ProfilePictureUpdateView(LoginRequiredMixin, FormMixin, DetailView):
         h = form.cleaned_data['height']
         # image crop and resize
         image_file = io.BytesIO(image_field.read())
-        ext = image_field.name.split('.')[-1]
+        ext = image_field.name.split('.')[-1].lower()
+        #TODO: support GIF format        
         image = Image.open(image_file)
         image = image.crop((x, y, x+w, y+h))
         image_clean = image.resize((settings.PIC_WIDTH,
                              settings.PIC_RATIO*settings.PIC_WIDTH),
                              Image.ANTIALIAS)
         image_file = io.BytesIO()
-        image_clean.save(image_file,ext)
+        image_clean.save(image_file,"PNG")
         image_field.file = image_file
         # renaming
-        filename = "{}_pic.{}".format(self.object.note.pk, ext)
+        filename = "{}_pic.png".format(self.object.note.pk)
         image_field.name = filename
         self.object.note.display_image = image_field
         self.object.note.save()
diff --git a/nginx_note.conf_example b/nginx_note.conf_example
index 1f7ce4ca..204784d0 100644
--- a/nginx_note.conf_example
+++ b/nginx_note.conf_example
@@ -9,7 +9,7 @@ server {
     # the port your site will be served on
     listen      80;
     # the domain name it will serve for
-    server_name note.comby.xyz; # substitute your machine's IP address or FQDN
+    server_name note.example.org; # substitute your machine's IP address or FQDN
     charset     utf-8;
 
     # max upload size
diff --git a/note_kfet/settings/development.py b/note_kfet/settings/development.py
index e16b6cf2..83436339 100644
--- a/note_kfet/settings/development.py
+++ b/note_kfet/settings/development.py
@@ -51,9 +51,10 @@ SESSION_COOKIE_AGE = 60 * 60 * 3
 
 # CAS Client settings
 # Can be modified in secrets.py
-CAS_SERVER_URL = "https://note.comby.xyz/cas/"
+CAS_SERVER_URL = "http://localhost:8000/cas/"
 
 
 STATIC_ROOT = '' # not needed in development settings
 STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'static')]
+