diff --git a/Gemfile b/Gemfile
index 88893f0..e0e1ad4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 5.2.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # 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', '~> 2.5'
 # Use ActiveModel has_secure_password
diff --git a/Gemfile.lock b/Gemfile.lock
index d4fd33b..7367fd1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -133,7 +133,7 @@ GEM
     parser (2.6.5.0)
       ast (~> 2.4.0)
     pg (1.1.4)
-    puma (3.12.1)
+    puma (3.12.2)
     rack (2.0.7)
     rack-cors (1.1.0)
       rack (>= 2.0.0)
@@ -276,7 +276,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   mailgun-ruby
   pg
-  puma (~> 3.11)
+  puma (~> 3.12)
   rack-cors
   railroady
   rails (~> 5.2.1)