diff --git a/src/ohmyapi/core/runtime.py b/src/ohmyapi/core/runtime.py
index 0b110f8..191136d 100644
--- a/src/ohmyapi/core/runtime.py
+++ b/src/ohmyapi/core/runtime.py
@@ -306,7 +306,7 @@ class App:
         # An app may come without any routes.
         try:
             importlib.import_module(mod_name)
-        except ModuleNotFound:
+        except ModuleNotFoundError:
             return
 
         # Avoid duplicates.