diff --git a/Gemfile.lock b/Gemfile.lock
index c04d26ff..de24b2c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
     public_suffix (5.0.1)
     pygments.rb (2.3.1)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.13)
     rb-fchange (0.0.6)
       ffi
     rb-fsevent (0.11.2)