diff --git a/extensions/yaml/package.json b/extensions/yaml/package.json
index 1ef92e2cf99..cc2de873468 100644
--- a/extensions/yaml/package.json
+++ b/extensions/yaml/package.json
@@ -39,7 +39,8 @@
           ".yml",
           ".eyaml",
           ".eyml",
-          ".yaml"
+          ".yaml",
+          ".cff"
         ],
         "firstLine": "^#cloud-config",
         "configuration": "./language-configuration.json"