diff --git a/Gemfile b/Gemfile
index b611809..a5299e2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 5.2.1'
 # Use sqlite3 as the database for Active Record
 
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 gem 'pg', '>= 0.18', '< 2.0'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
diff --git a/Gemfile.lock b/Gemfile.lock
index e6ef109..f787099 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -771,7 +771,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.8)
       pry (>= 0.10.4)
-    puma (3.12.0)
+    puma (3.12.4)
     rack (2.0.5)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -835,7 +835,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry-rails
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.1)
   spring
   spring-watcher-listen (~> 2.0.0)