diff --git a/metadata.json b/metadata.json
index eaf84e7..1d40b45 100644
--- a/metadata.json
+++ b/metadata.json
@@ -1,43 +1,43 @@
 {
   "name": "ssm-hitch",
   "version": "0.1.4",
   "author": "ssm",
   "summary": "Install and configure Hitch TLS proxy",
   "license": "Apache-2.0",
   "source": "https://github.com/ssm/ssm-hitch.git",
   "project_page": "https://github.com/ssm/ssm-hitch",
   "issues_url": "https://github.com/ssm/ssm-hitch/issues",
   "dependencies": [
     {
       "name": "puppetlabs-stdlib",
-      "version_requirement": ">= 4.0.0"
+      "version_requirement": ">= 4.12.0"
     },
     {
       "name": "puppetlabs-concat",
-      "version_requirement": ">= 1.0.0 <= 2.0.0"
+      "version_requirement": ">= 4.0.0 <= 6.0.0"
     }
   ],
   "operatingsystem_support": [
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
         "8"
       ]
     },
     {
       "operatingsystem": "RedHat",
       "operatingsystemrelease": [
         "7"
       ]
     }
   ],
   "requirements": [
     {
       "name": "puppet",
       "version_requirement": ">= 4.10.0 < 7.0.0"
     }
   ],
   "pdk-version": "1.9.0",
   "template-url": "file:///opt/puppetlabs/pdk/share/cache/pdk-templates.git",
   "template-ref": "1.9.0-0-g7281db5"
-}
\ No newline at end of file
+}