diff --git a/project_honeypot.gemspec b/project_honeypot.gemspec
index b5f6c07..b3b4911 100644
--- a/project_honeypot.gemspec
+++ b/project_honeypot.gemspec
@@ -19,5 +19,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'flexmock'
 
-  s.add_runtime_dependency 'net-dns'
+  s.add_runtime_dependency 'net-dns', '~> 0.7.1'
 end