diff --git a/README.md b/README.md
index 4e16312..3fd0f92 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Manage S3 buckets from any provider.
 
 ## Environment Variables
 
-* `S3_ACCESS_KEY_ID`
-* `S3_SECRET_ACCESS_KEY`
+* `S3_ACCESS_KEY_ID`: Your S3 access key ID
+* `S3_SECRET_ACCESS_KEY`: Your S3 secred access key
 * `S3_ENDPOINT`: Optional. In case you are using a different S3 provider than AWS. Defaults to `s3.amazonaws.com`
 * `V2_SIGNING`: Optional. In case your S3 provider still uses V2 Signing, set this to `true`