diff --git a/tdd-blog/Gemfile.lock b/tdd-blog/Gemfile.lock
index 6e46f51..f3caa66 100644
--- a/tdd-blog/Gemfile.lock
+++ b/tdd-blog/Gemfile.lock
@@ -129,7 +129,7 @@ GEM
     public_suffix (4.0.6)
     puma (4.3.7)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-proxy (0.6.5)
       rack
     rack-test (1.1.0)