diff --git a/.rubocop.yml b/.rubocop.yml
index 80b1a04..fa311d0 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -80,3 +80,10 @@ Metrics/BlockLength:
 Lint/InterpolationCheck:
   Enabled: false
 
+Style/FormatStringToken:
+  Exclude:
+    - lib/github_changelog_generator/parser.rb
+
+Style/MixinUsage:
+  Exclude:
+    - lib/github_changelog_generator/task.rb
diff --git a/github_changelog_generator.gemspec b/github_changelog_generator.gemspec
index 709959b..2e5f3aa 100644
--- a/github_changelog_generator.gemspec
+++ b/github_changelog_generator.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |spec|
   spec.version            = GitHubChangelogGenerator::VERSION
   spec.default_executable = "github_changelog_generator"
 
-  spec.required_ruby_version = ">= 1.9.3"
+  spec.required_ruby_version = ">= 2.2.2"
   spec.authors = ["Petr Korolev", "Olle Jonsson"]
   spec.email = "sky4winder+github_changelog_generator@gmail.com"