diff --git a/Gemfile b/Gemfile
index d35de94..2797594 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 5.1.4'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # 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/Gemfile.lock b/Gemfile.lock
index 9fa5bfa..f68b156 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,8 +89,8 @@ GEM
     nokogiri (1.10.9-x64-mingw32)
       mini_portile2 (~> 2.4.0)
     public_suffix (3.0.1)
-    puma (3.11.2)
-    rack (2.0.3)
+    puma (3.12.6)
+    rack (2.2.2)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
     rails (5.1.4)
@@ -116,7 +116,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.3.0)
+    rake (13.0.1)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -176,7 +176,7 @@ DEPENDENCIES
   capybara (~> 2.13)
   coffee-rails (~> 4.2)
   jbuilder (~> 2.5)
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.4)
   sass-rails (~> 5.0)
   selenium-webdriver