diff --git a/samples/client/petstore/ruby/Gemfile.lock b/samples/client/petstore/ruby/Gemfile.lock
index 05a6aa23790..a89283b951b 100644
--- a/samples/client/petstore/ruby/Gemfile.lock
+++ b/samples/client/petstore/ruby/Gemfile.lock
@@ -9,7 +9,8 @@ GEM
   remote: http://rubygems.org/
   specs:
     ZenTest (4.11.0)
-    addressable (2.3.8)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     autotest (4.4.6)
       ZenTest (>= 4.4.1)
     autotest-fsevent (0.2.10)
@@ -23,6 +24,7 @@ GEM
       ffi (>= 1.3.0)
     ffi (1.9.8)
     json (1.8.2)
+    public_suffix (4.0.6)
     rspec (3.2.0)
       rspec-core (~> 3.2.0)
       rspec-expectations (~> 3.2.0)