diff --git a/Gemfile b/Gemfile
index b390a16..b4c6e66 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.1'
 # 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'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index dd86b79..cd1ab16 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,7 +89,7 @@ GEM
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     pg (1.1.3)
-    puma (3.12.0)
+    puma (3.12.6)
     rack (2.0.6)
     rack-cors (1.0.2)
     rack-test (1.1.0)
@@ -173,7 +173,7 @@ DEPENDENCIES
   jwt
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.2.1)
   sass-rails (~> 5.0)