diff --git a/Gemfile b/Gemfile
index 9e40933..1adde5c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.3'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index 0252619..b1bc4f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
     pg (1.1.4-x64-mingw32)
-    puma (3.12.1)
+    puma (3.12.6)
     rack (2.2.3)
     rack-cors (1.0.3)
     rack-test (1.1.0)
@@ -141,7 +141,7 @@ DEPENDENCIES
   bootsnap (>= 1.1.0)
   byebug
   pg (>= 0.18, < 2.0)
-  puma (~> 3.11)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.2.3)
   tzinfo-data