diff --git a/Gemfile b/Gemfile
index 09df462..7ff15d1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'rails', '~> 5.2.2', '>= 5.2.2.1'
 # Use postgres as the database for Active Record
 gem 'pg'
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 
 # gem 'bundler', '1.3.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 8ea3e48..dfc7b29 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,7 +76,7 @@ GEM
     nokogiri (1.10.2)
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -137,7 +137,7 @@ DEPENDENCIES
   byebug
   listen (>= 3.0.5, < 3.2)
   pg
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.2, >= 5.2.2.1)
   spring
   spring-watcher-listen (~> 2.0.0)