diff --git a/Gemfile.lock b/Gemfile.lock
index 07aed14..c52cb5e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     public_suffix (3.1.1)
-    rack (2.0.7)
+    rack (2.1.4.3)
     rack-protection (2.0.7)
       rack
     rainbow (2.2.2)