diff --git a/Gemfile b/Gemfile
index 98be016..dc19d02 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem "rails", "~> 5.2.3"
 # Use sqlite3 as the database for Active Record
 gem "sqlite3"
 # Use Puma as the app server
-gem "puma", "~> 3.11"
+gem "puma", "~> 5.6"
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index 4a04e8e..062071a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,9 @@ GEM
     mime-types (3.3)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.1009)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.13.0)
@@ -105,7 +107,8 @@ GEM
       ast (~> 2.4.0)
     pg (1.1.4)
     public_suffix (4.0.1)
-    puma (3.12.1)
+    puma (5.6.2)
+      nio4r (~> 2.0)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -122,10 +125,6 @@ GEM
       bundler (>= 1.3.0)
       railties (= 5.2.3)
       sprockets-rails (>= 2.0.0)
-    rails-controller-testing (1.0.4)
-      actionpack (>= 5.0.1.x)
-      actionview (>= 5.0.1.x)
-      activesupport (>= 5.0.1.x)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
@@ -217,9 +216,8 @@ DEPENDENCIES
   json
   listen (>= 3.0.5, < 3.2)
   pg
-  puma (~> 3.11)
+  puma (~> 5.6)
   rails (~> 5.2.3)
-  rails-controller-testing
   responders
   rest-client
   rspec-rails