diff --git a/Gemfile.lock b/Gemfile.lock
index e1732fcd..f648dab4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -235,7 +235,7 @@ GEM
     public_suffix (3.0.3)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.5)