diff --git a/deploy-examples/RWKV-Runner-WebUI/setup.bat b/deploy-examples/RWKV-Runner-WebUI/setup.bat
index d9d5583..f9288db 100644
--- a/deploy-examples/RWKV-Runner-WebUI/setup.bat
+++ b/deploy-examples/RWKV-Runner-WebUI/setup.bat
@@ -9,6 +9,7 @@ call npm ci
 call npm run build
 cd ..
 
+: optional: set ngrok_token=YOUR_NGROK_TOKEN
 start python ./backend-python/main.py --webui
 start "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" "http://127.0.0.1:8000"
 
diff --git a/deploy-examples/RWKV-Runner-WebUI/setup.sh b/deploy-examples/RWKV-Runner-WebUI/setup.sh
index c8794c1..132578d 100644
--- a/deploy-examples/RWKV-Runner-WebUI/setup.sh
+++ b/deploy-examples/RWKV-Runner-WebUI/setup.sh
@@ -11,6 +11,7 @@ npm ci
 npm run build
 cd ..
 
+# optional: export ngrok_token=YOUR_NGROK_TOKEN
 python3 ./backend-python/main.py --webui > log.txt & # this is only an example, you should use screen or other tools to run it in background
 
 if [ ! -d models ]; then