diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 6187c6a..8f16543 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -125,7 +125,7 @@ GEM
     pg (1.1.4)
     public_suffix (3.0.3)
     puma (3.12.1)
-    rack (2.0.6)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)