diff --git a/Gemfile.lock b/Gemfile.lock
index f500b856e..4b8c55dd2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -227,7 +227,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rainbow (3.0.0)
@@ -270,4 +270,4 @@ DEPENDENCIES
   rake
 
 BUNDLED WITH
-   2.1.2
+   2.1.4