diff --git a/Gemfile.lock b/Gemfile.lock
index 9ab79c5..f3100d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
       ast (~> 2.4.0)
     psych (3.1.0)
     puma (3.12.6)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-protection (2.0.5)
       rack
     rainbow (3.0.0)