diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index c7c9483..928cfa2 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -32,5 +32,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rubocop', '~> 0.80.0'
-  s.add_development_dependency 'bundler-audit'
+  s.add_development_dependency 'bundler-audit', '~> 0.6.0'
 end