diff --git a/Gemfile b/Gemfile
index 3e36526..fa4f95c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ gem 'jquery-rails'
 gem 'twitter'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+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 972e470..e83b6d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
       activesupport (>= 4.2)
       arel (>= 6)
     public_suffix (3.0.1)
-    puma (3.11.0)
+    puma (3.12.4)
     rack (2.0.8)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
@@ -270,7 +270,7 @@ DEPENDENCIES
   omniauth-slack
   pg (~> 0.18)
   pg_search
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.3)
   sass-rails (~> 5.0)
   selenium-webdriver