diff --git a/ruby/Gemfile.lock b/ruby/Gemfile.lock
index cc37adacc..783b6badd 100644
--- a/ruby/Gemfile.lock
+++ b/ruby/Gemfile.lock
@@ -138,7 +138,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails-dom-testing (2.0.3)