how_is.gemspec in how_is-2.0.0 vs how_is.gemspec in how_is-3.0.0

@@ -17,14 +17,17 @@
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
   spec.add_runtime_dependency "github_api", "~> 0.13.1"
-  spec.add_runtime_dependency "configru", "~> 3.6.0"
   spec.add_runtime_dependency "contracts"
   spec.add_runtime_dependency "prawn"
 
   spec.add_runtime_dependency "mini_magick"
+
+  # Travis CI only supports up to Ruby 2.2.0, but Rack 2.0+ requires Ruby 2.2.2+,
+  # so this pegs Rack to the latest version that works with Ruby 2.2.0.
+  spec.add_runtime_dependency "rack", "< 2.0"
 
   spec.add_development_dependency "bundler", "~> 1.11"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end