diff --git a/rack/blog/Gemfile.lock b/rack/blog/Gemfile.lock
index 1e92728..79ef627 100644
--- a/rack/blog/Gemfile.lock
+++ b/rack/blog/Gemfile.lock
@@ -110,7 +110,7 @@ GEM
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     public_suffix (4.0.6)
-    puma (4.3.9)
+    puma (4.3.11)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)