diff --git a/Gemfile b/Gemfile
index 0dd8dfa..9de473a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ ruby '2.6.0'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.2.2'
 # Use Puma as the app server
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.6'
 # 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 6aa263d..f364722 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -178,7 +178,7 @@ GEM
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
     net-ssh (5.1.0)
-    nio4r (2.5.8)
+    nio4r (2.5.9)
     nokogiri (1.13.6)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
@@ -186,7 +186,7 @@ GEM
     orm_adapter (0.5.0)
     popper_js (1.14.5)
     public_suffix (4.0.6)
-    puma (4.3.12)
+    puma (5.6.7)
       nio4r (~> 2.0)
     raabro (1.1.6)
     racc (1.6.0)
@@ -321,7 +321,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   mysql2 (~> 0.5.2)
   open_uri_redirections (~> 0.2.1)
-  puma (~> 4.3)
+  puma (~> 5.6)
   rails (~> 5.2.2)
   sass-rails (~> 5.0)
   selenium-webdriver