diff --git a/Gemfile.lock b/Gemfile.lock
index 8bdf9576..e989a40b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,7 +99,7 @@ GEM
     public_suffix (4.0.7)
     pygments.rb (2.3.1)
     racc (1.6.2)
-    rack (2.2.8)
+    rack (2.2.8.1)
     rainbow (3.0.0)
     rake (12.3.3)
     rb-fsevent (0.9.4)