diff --git a/Gemfile b/Gemfile
index adf2f00..8137b00 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.0'
 # Use sqlite3 as the database for Active Record
 gem 'mysql2' # , '0.3.20'
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index 3e7f4bd..7b227bc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -179,7 +179,7 @@ GEM
       activerecord (>= 5.2.1)
     popper_js (1.16.0)
     public_suffix (4.0.4)
-    puma (3.12.4)
+    puma (3.12.6)
     rack (2.2.2)
     rack-proxy (0.6.5)
       rack
@@ -316,7 +316,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (>= 3.0.5, < 3.2)
   mysql2
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 6.0.0)
   rails-erd
   redcarpet