diff --git a/README.md b/README.md
index 6e5badc..e788c03 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ no matter what directory you run it from.)
 ```
 git clone https://git.xeno.science/xenofem/poop-graph
 cd poop-graph
-cargo run
+cargo run --release
 ```
 
 ## Other setup