diff --git a/Gemfile b/Gemfile
index 8cbf146..cdd44f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.5.1'
 gem 'rails', '~> 5.2.2.1'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 gem 'resque'
 gem 'curb'
 gem 'crono'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6339666..4b4a3f2 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 (3.12.0)
+    puma (3.12.3)
     rack (2.0.6)
     rack-protection (2.0.5)
       rack
@@ -218,7 +218,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.2.1)
   resque
   sass-rails (~> 5.0)