diff --git a/README.md b/README.md
index e88024d..6aa8d63 100644
--- a/README.md
+++ b/README.md
@@ -178,7 +178,7 @@ To progress the timestamps in your generated data such that the latest
 timestamp reported by the simulation is set to the present (and all 
 others are appropriately "fast-forwarded"), use the following command:
 
-`python setup/progress_timestamps.py htlc_forwards.csv data/ln_10_data.csv`
+`python setup/progress_timestamps.py ln_10_raw_data.csv data/ln_10_data.csv`
 
 This will write the csv file with the updated timestamps to 
 `data/ln_10_data.csv`.