diff --git a/cloud-sql/postgres/activerecord/Gemfile.lock b/cloud-sql/postgres/activerecord/Gemfile.lock
index c25933285..ef556b8c5 100644
--- a/cloud-sql/postgres/activerecord/Gemfile.lock
+++ b/cloud-sql/postgres/activerecord/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    msgpack (1.7.2)
+    msgpack (1.8.2)
     net-imap (0.4.10)
       date
       net-protocol