diff --git a/README.md b/README.md
index ce35b1c78..9b57b39aa 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 ## Setup and run
+Add `ETH_RPC_URL=<your RPC url>` to `env.sh`
+
 `source env.sh`
 
 `python -m venv venv`