```ruby
# coding: utf-8

Gem::Specification.new do |spec|
  spec.name                    = "minimal-mistakes-jekyll"
  spec.version                 = "4.0.2"
  spec.authors                 = ["Michael Rose"]

  spec.summary                 = %q{A flexible two-column Jekyll theme.}
  spec.homepage                = "https://github.com/mmistakes/minimal-mistakes"
  spec.license                 = "MIT"

  spec.metadata["plugin_type"] = "theme"

  spec.files                   = `git ls-files -z`.split("\x0").select do |f|
    f.match(%r{^((_includes|_layouts|_sass|assets)/|(LICENSE|README|CHANGELOG)((\.(txt|md|markdown)|$)))}i)
  end

  spec.bindir                  = "exe"
  spec.executables             = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }

  spec.add_development_dependency "jekyll", "~> 3.3"
  spec.add_development_dependency "bundler", "~> 1.12"
  spec.add_development_dependency "rake", "~> 10.0"

  spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"
  spec.add_runtime_dependency "jekyll-sitemap", "~> 0.10"
  spec.add_runtime_dependency "jekyll-gist", "~> 1.4"
  spec.add_runtime_dependency "jekyll-feed", "~> 0.5.1"
  spec.add_runtime_dependency "jemoji", "~> 0.7"
end
```

Update regex for spec.files and remove bindir and executables
user
```ruby
# coding: utf-8

Gem::Specification.new do |spec|
  spec.name                    = "minimal-mistakes-jekyll"
  spec.version                 = "4.0.2"
  spec.authors                 = ["Michael Rose"]

  spec.summary                 = %q{A flexible two-column Jekyll theme.}
  spec.homepage                = "https://github.com/mmistakes/minimal-mistakes"
  spec.license                 = "MIT"

  spec.metadata["plugin_type"] = "theme"

  spec.files                   = `git ls-files -z`.split("\x0").select do |f|
    f.match(%r{^(assets|_(includes|layouts|sass)/|(LICENSE|README|CHANGELOG)((\.(txt|md|markdown)|$)))}i)
  end

  spec.add_development_dependency "jekyll", "~> 3.3"
  spec.add_development_dependency "bundler", "~> 1.12"
  spec.add_development_dependency "rake", "~> 10.0"

  spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"
  spec.add_runtime_dependency "jekyll-sitemap", "~> 0.10"
  spec.add_runtime_dependency "jekyll-gist", "~> 1.4"
  spec.add_runtime_dependency "jekyll-feed", "~> 0.5.1"
  spec.add_runtime_dependency "jemoji", "~> 0.7"
end
```
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