diff --git a/README.md b/README.md
index 01b2dd1..c6f4c34 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,14 @@
 
 A quick node.js wrapper for openpose to serve it as an API from a machine with CUDA to one without.
 
+## ENV
+
+```
+PORT=7474
+BIN=openpose
+CWD=.
+```
+
 ## POST /openpose
 
 Post an image to this endpoint using the field name "image" and receive the openpose data in JSON.