diff --git a/Gemfile b/Gemfile
index 3174ee1..fdc21a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.4', '>= 5.2.4.1'
 # Use sqlite3 as the database for Active Record
 # gem 'sqlite3'
 # 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 e98d58b..b4c54c8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     pg (0.20.0)
     public_suffix (4.0.3)
-    puma (3.12.2)
+    puma (3.12.4)
     rack (2.2.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -169,7 +169,6 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-
     thor (1.0.1)
     thread_safe (0.3.6)
     tilt (2.0.10)
@@ -204,13 +203,12 @@ DEPENDENCIES
   jquery-rails (~> 4.3.1)
   listen (>= 3.0.5, < 3.2)
   pg (= 0.20.0)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.4, >= 5.2.4.1)
   sass-rails (~> 5.0)
   selenium-webdriver
   spring
   spring-watcher-listen (~> 2.0.0)
-
   turbolinks (~> 5)
   tzinfo-data
   uglifier (>= 1.3.0)