diff --git a/volume/blog-backend/Gemfile b/volume/blog-backend/Gemfile
index 8f2e80a..305b30b 100644
--- a/volume/blog-backend/Gemfile
+++ b/volume/blog-backend/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.0'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
diff --git a/volume/blog-backend/Gemfile.lock b/volume/blog-backend/Gemfile.lock
index 90a6282..b8e2870 100644
--- a/volume/blog-backend/Gemfile.lock
+++ b/volume/blog-backend/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
     pry-remote (0.1.8)
       pry (~> 0.9)
       slop (~> 3.0)
-    puma (3.12.4)
+    puma (3.12.6)
     pundit (2.1.0)
       activesupport (>= 3.0.0)
     rack (2.2.2)
@@ -239,7 +239,7 @@ DEPENDENCIES
   pry
   pry-nav
   pry-remote
-  puma (~> 3.11)
+  puma (~> 3.12)
   pundit
   rack-cors
   rails (~> 6.0.0)