diff --git a/Gemfile.lock b/Gemfile.lock
index e2dcf83..489d16b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
       ast (~> 2.4.0)
     public_suffix (4.0.1)
     racc (1.4.15)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-contrib (2.1.0)
       rack (~> 2.0)
     rainbow (3.0.0)