diff --git a/src/collective/feedback/restapi/services/update.py b/src/collective/feedback/restapi/services/update.py
index 001a07b..5ba26f1 100644
--- a/src/collective/feedback/restapi/services/update.py
+++ b/src/collective/feedback/restapi/services/update.py
@@ -30,7 +30,10 @@ def reply(self):
         tool = getUtility(ICollectiveFeedbackStore)
 
         if self.params:
-            id = self.params[0]
+            try:
+                id = int(self.params[0])
+            except ValueError:
+                raise BadRequest(f"Bad id={self.params[0]} format provided")
 
             comment = tool.get(id)