diff --git a/Gemfile b/Gemfile
index 3baa402..f38fb08 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'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.5'
 gem 'active_model_serializers'
diff --git a/Gemfile.lock b/Gemfile.lock
index d562927..022afec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.7)
     rack-cors (1.0.3)
     rack-test (1.1.0)
@@ -172,7 +172,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 3.11)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.2.3)
   spring