diff --git a/README.md b/README.md
index cc938ed..9e8526e 100644
--- a/README.md
+++ b/README.md
@@ -17,5 +17,5 @@ pip install -r requirements.txt
 Usage
 -----
 1. Run update.py once a minute. e.g. using cron
-2. Run something to display the resulting waterfall.png. e.g. `feh -F -D 30 waterfall.png`
+2. Run something to display the resulting waterfall.png. e.g. `feh -F --reload 30.0 waterfall.png`
 3. Fun & Profit