diff --git a/ruby-puppetdb.gemspec b/ruby-puppetdb.gemspec
index 1f9d49a..ebd69f2 100644
--- a/ruby-puppetdb.gemspec
+++ b/ruby-puppetdb.gemspec
@@ -31,5 +31,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'puppetlabs_spec_helper'
   s.add_development_dependency 'racc', '~> 1.4'
   s.add_development_dependency 'rexical', '~> 1.0'
-  s.add_development_dependency 'puppet-blacksmith', '~> 4.1'
+  s.add_development_dependency 'puppet-blacksmith', '~> 6.1'
 end