diff --git a/Gemfile.lock b/Gemfile.lock
index 3ecf8b7d..8ca62a2e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
     listen (3.0.5)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rb-fsevent (0.9.6)