diff --git a/lib/pact/cli.rb b/lib/pact/cli.rb
index 3038f53a..c8949d88 100755
--- a/lib/pact/cli.rb
+++ b/lib/pact/cli.rb
@@ -4,6 +4,9 @@
 
 module Pact
   class CLI < Thor
+    def self.exit_on_failure? # Thor 1.0 deprecation guard
+      false
+    end
 
     desc 'verify', "Verify a pact"
     method_option :pact_helper, aliases: "-h", desc: "Pact helper file", :required => true
diff --git a/pact.gemspec b/pact.gemspec
index 0a063042..6d02383e 100644
--- a/pact.gemspec
+++ b/pact.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |gem|
 
   gem.add_runtime_dependency 'rspec', '~> 3.0'
   gem.add_runtime_dependency 'rack-test', '>= 0.6.3', '< 2.0.0'
-  gem.add_runtime_dependency 'thor', '~> 0.20'
+  gem.add_runtime_dependency 'thor', '>= 0.20', '< 2.0'
   gem.add_runtime_dependency 'webrick', '~> 1.3'
   gem.add_runtime_dependency 'term-ansicolor', '~> 1.0'