diff --git a/.fixtures.yml b/.fixtures.yml
index 2bb941d..578437c 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -2,6 +2,6 @@ fixtures:
   repositories:
     "stdlib":
       "repo": "git://github.com/puppetlabs/puppetlabs-stdlib.git"
-      "ref": "v2.2.1"
+      "ref": "4.5.0"
   symlinks:
     "apt": "#{source_dir}"
diff --git a/spec/spec_helper_acceptance.rb b/spec/spec_helper_acceptance.rb
index 6b2aa5d..56b8dad 100644
--- a/spec/spec_helper_acceptance.rb
+++ b/spec/spec_helper_acceptance.rb
@@ -28,7 +28,7 @@ RSpec.configure do |c|
     hosts.each do |host|
       copy_module_to(host, :source => proj_root, :module_name => 'apt')
       shell("/bin/touch #{default['puppetpath']}/hiera.yaml")
-      on host, puppet('module install puppetlabs-stdlib --version 2.2.1'), { :acceptable_exit_codes => [0,1] }
+      on host, puppet('module install puppetlabs-stdlib --version 4.5.0'), { :acceptable_exit_codes => [0,1] }
     end
   end
 end