diff --git a/Gemfile b/Gemfile
index e903f39..09dfc37 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.6.2'
 
 gem 'pg', '>= 0.18'
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.6'
 gem 'rails', '5.2.3'
 gem 'sass-rails', '~> 5.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 09a5811..6d37325 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -165,14 +165,16 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.2.10)
     multi_json (1.13.1)
     nenv (0.3.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.1)
@@ -195,7 +197,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    puma (4.3.3)
+    puma (5.6.4)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-livereload (0.3.17)
@@ -353,7 +355,7 @@ DEPENDENCIES
   pg (>= 0.18)
   pry-byebug
   pry-rails
-  puma (~> 4.3)
+  puma (~> 5.6)
   rack-livereload
   rails (= 5.2.3)
   rails-erd