diff --git a/github.com/grpc-ecosystem/grpc-gateway/docs/Gemfile.lock b/github.com/grpc-ecosystem/grpc-gateway/docs/Gemfile.lock
index 6bc4cb1f8f..2f40c20a41 100644
--- a/github.com/grpc-ecosystem/grpc-gateway/docs/Gemfile.lock
+++ b/github.com/grpc-ecosystem/grpc-gateway/docs/Gemfile.lock
@@ -223,7 +223,7 @@ GEM
     ruby-enum (0.7.2)
       i18n
     ruby_dep (1.5.0)
-    rubyzip (1.2.1)
+    rubyzip (2.0.0)
     safe_yaml (1.0.4)
     sass (3.5.6)
       sass-listen (~> 4.0.0)