diff --git a/.fixtures.yml b/.fixtures.yml
index c32c285..bfedcc1 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -1,8 +1,10 @@
 fixtures:
   forge_modules:
-    stdlib: 
+    stdlib:
       repo: "puppetlabs/stdlib"
-    epel: 
+    epel:
       repo: "stahnma/epel"
+    concat:
+      repo: "puppetlabs/concat"
   symlinks:
     "rsnapshot": "#{source_dir}"
diff --git a/metadata.json b/metadata.json
index 144f071..c160005 100644
--- a/metadata.json
+++ b/metadata.json
@@ -18,7 +18,8 @@
   ],
   "dependencies": [
     { "name": "puppetlabs-stdlib","version_range": ">= 1.0.0" },
-    { "name": "stahnma-epel","version_range": ">= 1.0.0" }
+    { "name": "stahnma-epel","version_range": ">= 1.0.0" },
+    { "name": "puppetlabs-concat","version_range": ">= 2.0.0 < 3.0.0" }
   ],
   "operatingsystem_support": [
     {