diff --git a/goal_tools/gerrit.py b/goal_tools/gerrit.py
index 15d7ca9..ef2c161 100644
--- a/goal_tools/gerrit.py
+++ b/goal_tools/gerrit.py
@@ -104,7 +104,7 @@ class Review:
 
     @property
     def url(self):
-        return GERRIT_API_URL + self._id + '/'
+        return GERRIT_API_URL + str(self._id) + '/'
 
     @property
     def created(self):