diff --git a/storages/backends/gcloud.py b/storages/backends/gcloud.py
index 77b3e144..74a73973 100644
--- a/storages/backends/gcloud.py
+++ b/storages/backends/gcloud.py
@@ -330,9 +330,13 @@ def url(self, name, parameters=None):
                 quoted_name=_quote(name, safe=b"/~"),
             )
         elif not self.custom_endpoint:
-            return blob.generate_signed_url(**self.signed_url_extra())
+            return blob.generate_signed_url(
+                expiration=self.expiration,
+                **self.signed_url_extra()
+            )
         else:
             return blob.generate_signed_url(
+                expiration=self.expiration,
                 api_access_endpoint=self.custom_endpoint,
                 **self.signed_url_extra()
             )