diff --git a/centurion.gemspec b/centurion.gemspec
index 20ecff16..b8f4c2ee 100644
--- a/centurion.gemspec
+++ b/centurion.gemspec
@@ -39,7 +39,7 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'rspec', '~> 2.14.0'
+  spec.add_development_dependency 'rspec', '~> 3.1.0'
   spec.add_development_dependency 'pry'
   spec.add_development_dependency 'simplecov'
 
diff --git a/spec/dogestry_spec.rb b/spec/dogestry_spec.rb
index 4f3800c4..3404c252 100644
--- a/spec/dogestry_spec.rb
+++ b/spec/dogestry_spec.rb
@@ -50,6 +50,7 @@
 
   describe '#which' do
     it 'finds dogestry command line' do
+      allow(File).to receive(:executable?).and_return(true)
       registry.which('dogestry').should_not == nil
     end
   end