diff --git a/Gemfile.lock b/Gemfile.lock
index 29a3652b..50bdd366 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -215,7 +215,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (3.0.1)
     puma (3.11.0)
-    rack (2.2.2)
+    rack (2.2.3.1)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
     rails (5.1.4)