diff --git a/blog/containerized_sinatra_app/Gemfile.lock b/blog/containerized_sinatra_app/Gemfile.lock
index 7d6ff24..57b91b9 100644
--- a/blog/containerized_sinatra_app/Gemfile.lock
+++ b/blog/containerized_sinatra_app/Gemfile.lock
@@ -72,9 +72,9 @@ GEM
       rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (2.0.2)
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     zonefile (1.04)