diff --git a/README.md b/README.md
index f31ad38..fa76275 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,11 @@ build-packs
 * `-o` or `--outdir` - The directory to output the compiled packs to. Defaults to dist.
 * `-c` or `--common` - The common directory containing shared files. Defailts to common.
 * `-r` or `--revision` - The revision/version. Defaults to `git rev-parse --short HEAD` if .git exists, else required.
+
+### Info File
+An `info.json` file should be present in the input directory. This file should contain the following fields:
+* `name` - The name of the pack.
+* `description` - A description of the pack.
+* `url` - The URL to the pack's repository.
+* `versions` - A two dimensional array of mc version to pack format. (`[[mcVersion, packFormat]]`)
+* `exports` - The exports to be made from the zip files produced for each version. A two dimensional array of mcVersion or "all". (`[["all"],["1.20", "1.20.2"]]`)