diff --git a/themes/theme-definitions-theme.json.md b/themes/theme-definitions-theme.json.md
index fa3cd5d..1ba05f4 100644
--- a/themes/theme-definitions-theme.json.md
+++ b/themes/theme-definitions-theme.json.md
@@ -2,8 +2,13 @@
 
 `theme.json` files require the following properties:
 
-* `name` - The name of the theme
-* `description` - Brief description of the theme
-* `version` - Version of the theme
-* `author` - Theme authors
-* `github_repo` - The source repository of the theme, this is required for Cider to automatically update the theme. Formatted `<owner>/<repo_name>`
+* `name: string` - The name of the theme
+* `description: string` - Brief description of the theme
+* `version: string` - Version of the theme
+* `author: string` - Theme authors
+* `github_repo: string` - The source repository of the theme, this is required for Cider to automatically update the theme. Formatted `<owner>/<repo_name>`
+* `pack: array` - (optional) Declare individual LESS files as styles within the package
+  * Pack Object Format:
+    * `name: string` - Name of the style
+    * `file: string` - File name within the package / repo
+    * `description: string` - Description of the style