diff --git a/.fixtures.yml b/.fixtures.yml
index 8bcecca57..9af298411 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -2,7 +2,9 @@ fixtures:
   repositories:
     apache: https://github.com/puppetlabs/puppetlabs-apache.git
     apt: https://github.com/puppetlabs/puppetlabs-apt.git
-    firewall: https://github.com/puppetlabs/puppetlabs-firewall
+    firewall:
+      repo: https://github.com/puppetlabs/puppetlabs-firewall
+      ref: v6.0.0
     stdlib: https://github.com/puppetlabs/puppetlabs-stdlib.git
     concat: https://github.com/puppetlabs/puppetlabs-concat.git
     postgresql: https://github.com/puppetlabs/puppet-postgresql.git
diff --git a/metadata.json b/metadata.json
index bdcee59e3..c6f5ed8ec 100644
--- a/metadata.json
+++ b/metadata.json
@@ -22,7 +22,7 @@
     },
     {
       "name": "puppetlabs/firewall",
-      "version_requirement": ">= 1.7.0 < 4.0.0"
+      "version_requirement": ">= 1.7.0 < 7.0.0"
     },
     {
       "name": "puppetlabs/apt",