diff --git a/Gemfile.lock b/Gemfile.lock
index ce38206..9dc4d28 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -66,7 +66,7 @@ GEM
       racc (~> 1.4)
     public_suffix (4.0.6)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-protection (2.1.0)
       rack
     ruby2_keywords (0.0.2)