diff --git a/matchbook/Gemfile.lock b/matchbook/Gemfile.lock
index 498ad9a..9984833 100644
--- a/matchbook/Gemfile.lock
+++ b/matchbook/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     multi_json (1.5.0)
     nokogiri (1.11.0)
     polyglot (0.3.3)
-    rack (1.4.4)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.3)