diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 551097b41..261ee62c1 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -331,7 +331,7 @@ GEM
       pusher-signature (~> 0.1.8)
     pusher-signature (0.1.8)
     racc (1.8.0)
-    rack (2.2.9)
+    rack (2.2.20)
     rack-cors (2.0.1)
       rack (>= 2.0.0)
     rack-session (1.0.2)