diff --git a/Gemfile b/Gemfile
index b5a6756..0f3e735 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'rails', '~> 5.0.0', '>= 5.0.0.1'
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 3.12'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'coffee-rails', '~> 4.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index a5fd41c..1581f90 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -138,7 +138,7 @@ GEM
       omniauth (~> 1.2)
     orm_adapter (0.5.0)
     pg (1.0.0)
-    puma (3.11.4)
+    puma (3.12.2)
     rack (2.0.7)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -246,7 +246,7 @@ DEPENDENCIES
   omniauth-facebook (~> 4.0)
   omniauth-google-oauth2 (~> 0.4.1)
   pg
-  puma (~> 3.0)
+  puma (~> 3.12)
   railroad
   railroady (~> 1.5, >= 1.5.2)
   rails (~> 5.0.0, >= 5.0.0.1)