diff --git a/README.md b/README.md
index 6553a40..e5f8b2b 100644
--- a/README.md
+++ b/README.md
@@ -26,3 +26,19 @@ All commands are run from the root of the project, from a terminal:
 | `pnpm run astro -- --help` | Get help using the Astro CLI                     |
 
 Documentation is available [here](https://docs.astro.build).
+
+
+## Required Environment Variables
+
+This project requires certain environment variables to be present in order for builds to be successful.
+
+To solve this, create a file named `.env` and place the following inside:
+
+
+```
+PUBLIC_VERCEL_GIT_REPO_OWNER=Xevion
+PUBLIC_VERCEL_GIT_REPO_SLUG=undefined.behavio.rs
+PUBLIC_VERCEL_GIT_COMMIT_SHA=ABC12345
+```
+
+These variables will be provided by Vercel upon build, so the `.env` file is only useful in development mode.
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