diff --git a/Gemfile b/Gemfile
index fb2558c..19d5c9a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ ruby '2.5.3'
 
 gem 'rails', '~> 5.2.1'
 gem 'sqlite3'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 gem 'bootsnap', '>= 1.1.0', require: false
 gem 'rack-cors', require: 'rack/cors'
 gem 'responders'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6e04e13..332e8cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,7 @@ GEM
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     public_suffix (3.1.1)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.7)
     rack-cors (1.0.3)
     rack-test (1.1.0)
@@ -187,7 +187,7 @@ DEPENDENCIES
   byebug
   httparty
   listen (>= 3.0.5, < 3.2)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.2.1)
   responders