diff --git a/kingfisher_scrapy/spiders/mexico_nuevo_leon.py b/kingfisher_scrapy/spiders/mexico_nuevo_leon.py
index 7022b052..cbb06950 100644
--- a/kingfisher_scrapy/spiders/mexico_nuevo_leon.py
+++ b/kingfisher_scrapy/spiders/mexico_nuevo_leon.py
@@ -29,6 +29,6 @@ def start_requests(self):
     @handle_http_error
     def parse_list(self, response):
         for resource in response.json()['result']['resources']:
-            if resource['format'].upper() == 'JSON':
-                # Presently, only one URL matches.
+            # Some files don't include an extension file, so we need to check the file name instead.
+            if resource['name'].upper().startswith('JSON-OCDS'):
                 yield self.build_request(resource['url'], formatter=components(-1))