diff --git a/README.md b/README.md
index 7f3ab5df..8656d593 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ python3 -m app import /path/to/products.jsonl.gz --num_processes=2
 
 Or using docker:
 ```console
-docker-compose run --rm -v $(pwd)/path/to/products.jsonl.gz:/mnt/products.jsonl.gz:ro api python3 -m app import /mnt/products.jsonl.gz --num_processes=2
+docker-compose run --rm -v $(pwd)/path/to/products.jsonl.gz:/mnt/products.jsonl.gz:ro api python3 -m app import /mnt/products.jsonl.gz --num-processes=2
 ```
 
 If you get errors, try adding more RAM (12GB works well if you have that spare), or slow down the indexing process by setting `num_processes` to 1 in the command above.