diff --git a/Gemfile b/Gemfile
index 738df30..e522749 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ end
 gem 'rails', '~> 5.2.0'
 gem 'slim-rails'
 gem 'pg', '~> 0.18'
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 3.12'
 gem 'dalli'
 
 gem 'uglifier', '>= 1.3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 1ce0f0d..243e092 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     pg (0.21.0)
-    puma (3.12.1)
+    puma (3.12.2)
     rack (2.0.7)
     rack-cors (1.0.3)
     rack-proxy (0.6.5)
@@ -204,7 +204,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
   pg (~> 0.18)
-  puma (~> 3.7)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.2.0)
   rb-readline