diff --git a/src/client.rs b/src/client.rs
index eb293f3..2e4374d 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -89,8 +89,6 @@ pub fn run(cli: ClientCli) -> Result<()> {
                 source_target.path().to_string(),
                 "--final-source".to_string(),
                 final_source_path.clone(),
-                "--extension".to_string(),
-                cli.extension.clone(),
                 "--chunk".to_string(),
                 cli.chunk.clone(),
                 "--level".to_string(),