diff --git a/appengine/rails-cloudsql-postgres/Gemfile.lock b/appengine/rails-cloudsql-postgres/Gemfile.lock
index 56bcb2933..d7ea9fb5f 100644
--- a/appengine/rails-cloudsql-postgres/Gemfile.lock
+++ b/appengine/rails-cloudsql-postgres/Gemfile.lock
@@ -108,7 +108,7 @@ GEM
     date (3.4.1)
     diff-lcs (1.5.0)
     drb (2.2.3)
-    erb (5.0.2)
+    erb (6.0.1.1)
     erubi (1.12.0)
     faraday (2.7.10)
       faraday-net_http (>= 2.0, < 3.1)