diff --git a/hooks/ruby/dismiss-review-server/Gemfile.lock b/hooks/ruby/dismiss-review-server/Gemfile.lock
index 06e50d805..b7e322761 100644
--- a/hooks/ruby/dismiss-review-server/Gemfile.lock
+++ b/hooks/ruby/dismiss-review-server/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
     mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-protection (2.2.3)
       rack
     rest-client (2.0.1)