diff --git a/scripts/openapi2jsonschema.py b/scripts/openapi2jsonschema.py
index 17a4d4c..fc31c70 100755
--- a/scripts/openapi2jsonschema.py
+++ b/scripts/openapi2jsonschema.py
@@ -5,6 +5,7 @@ import yaml
 import json
 import sys
 import os
+import urllib.request
 
 def test_additional_properties():
     for test in iter([{