diff --git a/lib/thermite/github_release_binary.rb b/lib/thermite/github_release_binary.rb
index 0314bd9..2ab05e9 100644
--- a/lib/thermite/github_release_binary.rb
+++ b/lib/thermite/github_release_binary.rb
@@ -54,7 +54,10 @@ def download_binary_from_github_release
 
     def download_cargo_version_from_github_release
       version = config.crate_version
+      # TODO: Change this to a named token and increment the 0.minor version
+      # rubocop:disable Style/FormatStringToken
       tag = options.fetch(:git_tag_format, 'v%s') % version
+      # rubocop:enable Style/FormatStringToken
       uri = github_download_uri(tag, version)
       return false unless (tgz = download_versioned_github_release_binary(uri, version))
 
diff --git a/thermite.gemspec b/thermite.gemspec
index 8c4427c..c93d545 100644
--- a/thermite.gemspec
+++ b/thermite.gemspec
@@ -14,8 +14,7 @@ Gem::Specification.new do |s|
   s.files         = `git ls-files`.split($OUTPUT_RECORD_SEPARATOR)
   s.require_paths = %w[lib]
 
-  # Mostly due to tomlrb
-  s.required_ruby_version = '>= 2.0.0'
+  s.required_ruby_version = '>= 2.1.0'
 
   s.add_runtime_dependency 'minitar', '~> 0.6'
   s.add_runtime_dependency 'rake', '>= 10'