diff --git a/.github/workflows/assert_version.py b/.github/workflows/assert_version.py
index 442d051..9ae6bfd 100755
--- a/.github/workflows/assert_version.py
+++ b/.github/workflows/assert_version.py
@@ -48,6 +48,9 @@ def check(obj, version, parents=''):
     for r in datapackage['resources']:
         to_check.append(r['schema'])
 
+else:
+    raise Exception('No required file found')
+
 for schema_path in to_check:
     with open(schema_path, 'r') as f:
         schema = json.load(f)