diff --git a/generation_config.yaml b/generation_config.yaml
index c96fd274bf..d2400c13ca 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
 gapic_generator_version: 2.64.1
-googleapis_commitish: ded7ed1e4cce7c165c56a417572cebea9bc1d82c
+googleapis_commitish: 8cd3749f4b98f2eeeef511c16431979aeb3a6502
 libraries_bom_version: 26.72.0
 libraries:
   - api_shortname: spanner