diff --git a/README.md b/README.md
index 8bade1eb2627456e7d5c8d0cfcf32cad34cfc36a..8db9564a7f1ba4c595eec1224015f731f62cc19e 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ To generate the sampled transcripts, open a new shell, activate your environment
 ```
 conda activate transcript-structure-generator
 
-transcript-generator --prob_inclusion <probability_inclusion> [--log "INFO"] <transcripts_file> <annotations_file>
+transcript-generator --prob-inclusion <probability_inclusion> [--log "INFO"] <transcripts_file> <annotations_file>
 ```
 
 where the transcripts file should be csv-formatted, the annotation file gtf-formatted and the inclusion probability for introns a float in the range [0,1]. The log parameter is optional and can be one of `["CRITICAL", "ERROR", "WARNING", "INFO", "DEBUG"]`. The default is `INFO`.