diff --git a/books/views.py b/books/views.py
index e71c0736..90cc5f6c 100644
--- a/books/views.py
+++ b/books/views.py
@@ -227,7 +227,7 @@ def create_update_mark(request):
                 words = BookMarkStatusTranslator(int(form.cleaned_data['status'])) +\
                      f"《{book.title}》" + rating_to_emoji(form.cleaned_data['rating'])
                 content = words + '\n' + url + '\n' + form.cleaned_data['text']
-                post_toot(content, visibility, request.session['oauth_token'])
+                post_toot(content, visibility, request.session['oauth_token'], local_only=True)
         else:
             return HttpResponseBadRequest()
 
diff --git a/common/mastodon/api.py b/common/mastodon/api.py
index db9196b0..73da37e2 100644
--- a/common/mastodon/api.py
+++ b/common/mastodon/api.py
@@ -66,7 +66,7 @@ def check_visibility(user_owned_entity, token, visitor):
         return True
 
 
-def post_toot(content, visibility, token):
+def post_toot(content, visibility, token, local_only=False):
     url = 'https://' + MASTODON_DOMAIN_NAME + API_PUBLISH_TOOT
     headers = {
         'Authorization': f'Bearer {token}',
@@ -74,7 +74,8 @@ def post_toot(content, visibility, token):
     }
     payload = {
         'status': content,
-        'visibility': visibility
+        'visibility': visibility,
+        'local_only': local_only,
     }
     response = post(url, headers=headers, data=payload)
     return response