diff --git a/Gemfile.lock b/Gemfile.lock
index 6aa8cb1..e7af40e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -217,7 +217,7 @@ GEM
       json (~> 1.8)
     quiet_assets (1.0.3)
       railties (>= 3.1, < 5.0)
-    rack (1.5.2)
+    rack (1.5.5)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-contrib (1.2.0)