diff --git a/Gemfile b/Gemfile
index f2d9b9c..8ae5298 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.6.1'
 gem 'rails', '~> 5.2.3'
 gem 'sqlite3'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'coffee-rails', '~> 4.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index b739c8b..3acca05 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -67,17 +67,11 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.2)
       xpath (~> 3.2)
-    carrierwave (1.3.1)
-      activemodel (>= 4.0.0)
-      activesupport (>= 4.0.0)
-      mime-types (>= 1.16)
     childprocess (1.0.1)
       rake (< 13.0)
     chromedriver-helper (2.1.1)
       archive-zip (~> 0.10)
       nokogiri (~> 1.8)
-    ckeditor (5.0.0)
-      orm_adapter (~> 0.5.0)
     coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0)
@@ -119,11 +113,7 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mime-types (3.2.2)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.0331)
     mimemagic (0.3.3)
-    mini_magick (4.9.3)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -133,7 +123,8 @@ GEM
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     public_suffix (3.1.0)
-    puma (3.12.1)
+    puma (4.3.11)
+      nio4r (~> 2.0)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -236,16 +227,13 @@ DEPENDENCIES
   bootstrap-sass (~> 3.3, >= 3.3.6)
   byebug
   capybara (>= 2.15)
-  carrierwave
   chromedriver-helper
-  ckeditor
   coffee-rails (~> 4.2)
   devise (~> 4.2)
   jbuilder (~> 2.5)
   jquery-rails
   listen (>= 3.0.5, < 3.2)
-  mini_magick
-  puma (~> 3.11)
+  puma (~> 4.3)
   rails (~> 5.2.3)
   sass-rails (~> 5.0)
   selenium-webdriver