diff --git a/generation_config.yaml b/generation_config.yaml
index 2b2635fc1..f51d8f514 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
 gapic_generator_version: 2.51.1
-googleapis_commitish: 8798ceff3f6fbcdce3186b67ce9339df337569d5
+googleapis_commitish: 27aa9d542f54ae1ea1277580550dd04aeb5b09f9
 libraries_bom_version: 26.53.0
 libraries:
   - api_shortname: pubsub