diff --git a/sensu-plugins-openldap.gemspec b/sensu-plugins-openldap.gemspec
index 4aa6697..bb12ea4 100644
--- a/sensu-plugins-openldap.gemspec
+++ b/sensu-plugins-openldap.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |s|
   s.version                = SensuPluginsOpenldap::Version::VER_STRING
 
   s.add_runtime_dependency 'sensu-plugin', '~> 1.2'
-  s.add_runtime_dependency 'net-ldap', '0.11'
+  s.add_runtime_dependency 'net-ldap', '= 0.16.1'
 
   s.add_development_dependency 'bundler',                   '~> 1.7'
   s.add_development_dependency 'codeclimate-test-reporter', '~> 0.4'