diff --git a/g07/Gemfile b/g07/Gemfile
index f17ac10..0ae4170 100644
--- a/g07/Gemfile
+++ b/g07/Gemfile
@@ -12,7 +12,7 @@ gem 'rails', '~> 5.1.5'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # 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/g07/Gemfile.lock b/g07/Gemfile.lock
index 4d190ba..c776062 100644
--- a/g07/Gemfile.lock
+++ b/g07/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
     pg (1.1.4)
     psych (3.1.0)
     public_suffix (3.0.3)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.6)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -247,7 +247,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   paperclip (~> 6.0.0)
   pg (>= 0.18, < 2.0)
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.5)
   rubocop-performance
   sass-rails (~> 5.0)