Error loading the 'sqlite3' Active Record adapter.エラーが出る

ruby on rails のフレームワークを使ってherokuでデプロイしようとしています。

mimemagicのGPL混入問題は
rails のバージョンupとmimemagicのgem追加で対応しました。
するとgit push heroku master でのFailed to install gems via Bundler.
は消えてgit push heroku master成功しました。

しかし、その後heroku open でデプロイできたはずのサイトに飛ぶとApplication errorが出てしまいました。

そこで、heroku run rails cでlogを確認したところ下記のエラーが出ます。
sqlite3' ActiveRecordアダプターのロード中にエラーが発生しましたと出ます
なので、sqlite3のバージョンを指定したりしましたがエラー内容は変わりませんでした。

原因がわかりません。
ご教授のほどよろしくお願いします。

ruby 2.5.1
rails 5.2.5

ターミナル

/app/vendor/bundle/ruby/2.5.0/gems/bundler-2.2.16/lib/bundler/rubygems_integration.rb:334:in `block (2 levels) in replace_gem': Error loading the 'sqlite3' Active Record adapter. Missing a gem it depends on? sqlite3 is not part of the bundle. Add it to your Gemfile. (LoadError)

gemfile
1ruby '2.5.1'
2
3# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
4# gem 'rails', '~> 5.2.3'
5gem 'rails', '~> 5.2.5'
6gem 'puma', '~> 3.11'
7
8gem 'sass-rails', '~> 5.0'
9# gem 'sass-rails'
10# Use Uglifier as compressor for JavaScript assets
11gem 'uglifier', '>= 1.3.0'
12# gem 'uglifier'
13# See https://github.com/rails/execjs#readme for more supported runtimes
14# gem 'mini_racer', platforms: :ruby
15
16# Use CoffeeScript for .coffee assets and views
17gem 'coffee-rails', '~> 4.2'
18# gem 'coffee-rails'
19# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
20gem 'turbolinks', '~> 5'
21# gem 'turbolinks'
22
23# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
24gem 'jbuilder', '~> 2.5'
25# gem 'jbuilder'
26# Use Redis adapter to run Action Cable in production
27# gem 'redis', '~> 4.0'
28# Use ActiveModel has_secure_password
29# gem 'bcrypt', '~> 3.1.7'
30
31# Use ActiveStorage variant
32# gem 'mini_magick', '~> 4.8'
33
34# Use Capistrano for deployment
35# gem 'capistrano-rails', group: :development
36
37# Reduces boot times through caching; required in config/boot.rb
38gem 'bootsnap', '>= 1.1.0', require: false
39# gem 'bootsnap', require: false
40
41group :development, :test do
42  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
43  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
44end
45
46group :development do
47  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
48  gem 'web-console', '>= 3.3.0'
49  # gem 'web-console'
50  gem 'listen', '>= 3.0.5', '< 3.2'
51  # gem 'listen'
52  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
53  gem 'spring'
54  gem 'spring-watcher-listen', '~> 2.0.0'
55  # gem 'spring-watcher-listen'
56end
57
58group :test do
59  # Adds support for Capybara system testing and selenium driver
60  gem 'capybara', '>= 2.15'
61  # gem 'capybara'
62  gem 'selenium-webdriver'
63  # Easy installation and use of chromedriver to run system tests with Chrome
64  gem 'chromedriver-helper'
65end
66
67# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
68gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
69
70
71gem 'font-awesome-sass'
72
73#デプロイ用
74# gem 'sqlite3', group: [:development, :test]
75gem 'sqlite3', '~> 1.3.6',group: [:development, :test]
76
77
78gem "mimemagic", "~> 0.3.10"
79