diff --git a/Gemfile.lock b/Gemfile.lock
index 83443b5..e1497eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -169,7 +169,7 @@ GEM
       pry (~> 0.13.0)
     public_suffix (4.0.7)
     racc (1.6.0)
-    rack (2.2.4)
+    rack (2.2.6.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.7.2)