diff --git a/Gemfile.lock b/Gemfile.lock
index 4f2186e..92d13fb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -98,7 +98,7 @@ GEM
       faraday (~> 0.7)
       multi_json (~> 1.0)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)