diff --git a/utils/actor_service.py b/utils/actor_service.py
index af7acc8..6c1f35a 100644
--- a/utils/actor_service.py
+++ b/utils/actor_service.py
@@ -4,6 +4,8 @@ import requests
 from urllib.parse import urlparse
 from Crypto.PublicKey import RSA
 
+from .urlutils import check_url
+
 logger = logging.getLogger(__name__)
 
 
@@ -23,6 +25,9 @@ class ActorService(object):
 
     def _fetch(self, actor_url):
         logger.debug(f'fetching remote object {actor_url}')
+
+        check_url(actor_url)
+
         resp = requests.get(actor_url, headers={
             'Accept': 'application/activity+json',
             'User-Agent': self._user_agent,    
diff --git a/utils/object_service.py b/utils/object_service.py
index 185488f..9445550 100644
--- a/utils/object_service.py
+++ b/utils/object_service.py
@@ -1,6 +1,8 @@
 import requests
 from urllib.parse import urlparse
 
+from .urlutils import check_url
+
 
 class ObjectService(object):
     def __init__(self, user_agent, col, inbox, outbox, instances):
@@ -13,6 +15,7 @@ class ObjectService(object):
 
     def _fetch_remote(self, object_id):
         print(f'fetch remote {object_id}')
+        check_url(object_id)
         resp = requests.get(object_id, headers={
             'Accept': 'application/activity+json',
             'User-Agent': self._user_agent,    
diff --git a/utils/opengraph.py b/utils/opengraph.py
index e67a5a8..a53c07b 100644
--- a/utils/opengraph.py
+++ b/utils/opengraph.py
@@ -5,7 +5,7 @@ import opengraph
 import requests
 from bs4 import BeautifulSoup
 
-from .urlutils import is_url_valid
+from .urlutils import is_url_valid, check_url
 
 
 def links_from_note(note):
@@ -38,6 +38,7 @@ def fetch_og_metadata(user_agent, col, remote_id):
     # FIXME(tsileo): set the user agent by giving HTML directly to OpenGraph
     htmls = []
     for l in links:
+        check_url(l)
         r = requests.get(l, headers={'User-Agent': user_agent})
         r.raise_for_status()
         htmls.append(r.text)