diff --git a/README.md b/README.md
index e56faa91e3624250ff69e2fbb3fcfee9e778fbdd..5761eb4c00cab1cdc391733f66ac4797ee2ce2ff 100755
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ nextflow ../workflow/main.nf --basecall_path "../../data/test_data/" \
         --basecall_trim "none" \
         --basecall_compute "gpu" \
         --basecall_demux "False" \
-        --outdir "test_basecall_gpu_no_demux_mouse"
+        --out_dir "test_basecall_gpu_no_demux_mouse"
   ```