diff --git a/README.md b/README.md
index 9b8a5a77a..73e3bd6f8 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@
 1. [Overview](#overview)
 1. [Module Description](#module-description)
 1. [Setup](#setup)
+    * [Requirements](#requirements)
     * [Beginning with Grafana](#beginning-with-grafana)
 1. [Usage](#usage)
     * [Classes and Defined Types](#classes-and-defined-types)
@@ -40,6 +41,15 @@ This module will:
   package source
 * Perform basic configuration of Grafana
 
+### Requirements
+
+* If using an operating system of the Debian-based family, and the "repo"
+`install_method`, you will need to ensure that
+[puppetlabs-apt](https://forge.puppet.com/puppetlabs/apt) version 4.x is
+installed.
+* If using Docker, you will need the
+[garethr/docker](https://forge.puppet.com/garethr/docker) module version 5.x
+
 ### Beginning with Grafana
 
 To install Grafana with the default parameters:
diff --git a/metadata.json b/metadata.json
index 934975e75..ca080ef7c 100644
--- a/metadata.json
+++ b/metadata.json
@@ -8,10 +8,6 @@
   "project_page": "https://github.com/voxpupuli/puppet-grafana",
   "issue_url": "https://github.com/voxpupuli/puppet-grafana/issues",
   "dependencies": [
-    {
-      "name": "garethr/docker",
-      "version_requirement": ">= 5.0.0 < 6.0.0"
-    },
     {
       "name": "maestrodev/wget",
       "version_requirement": ">= 1.7.3 < 2.0.0"
@@ -20,10 +16,6 @@
       "name": "puppet/archive",
       "version_requirement": ">= 1.0.1 < 2.0.0"
     },
-    {
-      "name": "puppetlabs/apt",
-      "version_requirement": ">=2.1.0 < 5.0.0"
-    },
     {
       "name": "puppetlabs/stdlib",
       "version_requirement": ">=4.6.0 < 5.0.0"
@@ -39,19 +31,22 @@
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "14.04"
+        "14.04",
+        "16.04"
       ]
     },
     {
       "operatingsystem": "RedHat",
       "operatingsystemrelease": [
+        "6",
         "6"
       ]
     },
     {
       "operatingsystem": "CentOS",
       "operatingsystemrelease": [
-        "6"
+        "6",
+        "7"
       ]
     },
     {
@@ -61,7 +56,7 @@
   "requirements": [
     {
       "name": "puppet",
-      "version_requirement": ">= 4.6.1 < 5.0.0"
+      "version_requirement": ">= 4.7.1 < 6.0.0"
     }
   ],
   "tags": [