diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 29e10aa..34fd971 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -87,7 +87,7 @@ GEM
       pkg-config (~> 1.1.7)
     pkg-config (1.1.7)
     puma (3.6.0)
-    rack (2.0.1)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)