diff --git a/puppet-openstack_spec_helper.gemspec b/puppet-openstack_spec_helper.gemspec
index 8333544..702380d 100644
--- a/puppet-openstack_spec_helper.gemspec
+++ b/puppet-openstack_spec_helper.gemspec
@@ -27,9 +27,12 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'puppet-lint-unquoted_string-check'
   spec.add_dependency 'puppet-lint-leading_zero-check'
   spec.add_dependency 'json'
-  spec.add_dependency 'netaddr'
   spec.add_dependency 'webmock'
 
+  # Force Netaddr 1.x as 2.x is not compatible
+  # https://github.com/dspinhirne/netaddr-rb/issues/5
+  spec.add_dependency 'netaddr', ['< 2.0.0']
+
   # Things that get pinned because we can't have nice things (new ruby > 2.0)
   spec.add_dependency 'fast_gettext', ['< 1.2.0']
   spec.add_dependency 'nokogiri', ['< 1.7.0']