diff --git a/blog/containerized_sinatra_app/Gemfile.lock b/blog/containerized_sinatra_app/Gemfile.lock
index 7d6ff24..a9683ca 100644
--- a/blog/containerized_sinatra_app/Gemfile.lock
+++ b/blog/containerized_sinatra_app/Gemfile.lock
@@ -59,8 +59,8 @@ GEM
     multi_json (1.11.2)
     multipart-post (2.0.0)
     os (0.9.6)
-    rack (1.6.4)
-    rack-protection (1.5.3)
+    rack (1.6.11)
+    rack-protection (1.5.5)
       rack
     retriable (1.4.1)
     signet (0.7.2)