diff --git a/Gemfile b/Gemfile
index 2902e7f..4bc1e7c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.3'
 # 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'
 gem 'nokogiri'
 gem 'json'
 gem 'pry'
diff --git a/Gemfile.lock b/Gemfile.lock
index f298b30..13f58c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,7 +103,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.1.1)
-    puma (3.12.1)
+    puma (3.12.2)
     rack (2.0.7)
     rack-cors (1.0.3)
     rack-test (1.1.0)
@@ -199,7 +199,7 @@ DEPENDENCIES
   nokogiri
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 3.11)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.2.3)
   rspec-rails