diff --git a/appengine/rails-cloudsql-mysql/Gemfile.lock b/appengine/rails-cloudsql-mysql/Gemfile.lock
index 1d68e8fe8..c3005f426 100644
--- a/appengine/rails-cloudsql-mysql/Gemfile.lock
+++ b/appengine/rails-cloudsql-mysql/Gemfile.lock
@@ -78,8 +78,8 @@ GEM
       mutex_m
       securerandom (>= 0.3)
       tzinfo (~> 2.0)
-    addressable (2.8.5)
-      public_suffix (>= 2.0.2, < 6.0)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
     appengine (0.7.0)
       google-cloud-env (~> 1.4)
       google-serverless-exec (>= 0.1, < 2.a)
@@ -229,7 +229,7 @@ GEM
     os (1.1.4)
     psych (5.1.2)
       stringio
-    public_suffix (5.0.3)
+    public_suffix (7.0.5)
     puma (6.3.1)
       nio4r (~> 2.0)
     racc (1.8.1)