diff --git a/examples/rails/Gemfile.lock b/examples/rails/Gemfile.lock
index 34f74487..b88da0ce 100644
--- a/examples/rails/Gemfile.lock
+++ b/examples/rails/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
       googleauth (~> 0.9)
       grpc (~> 1.24)
       rly (~> 0.2.3)
-    google-protobuf (3.17.3)
+    google-protobuf (3.21.7)
     googleapis-common-protos (1.3.11)
       google-protobuf (~> 3.14)
       googleapis-common-protos-types (>= 1.0.6, < 2.0)