diff --git a/src/runner.rs b/src/runner.rs
index f13b6bc..4129c48 100644
--- a/src/runner.rs
+++ b/src/runner.rs
@@ -102,6 +102,7 @@ impl<'a> Runner<'a> {
         let exit_status = tokio::select! {
             exit_status = async {
                 stdin.write_all(input).await?;
+                drop(stdin);
                 let exit_status = child.wait().await?;
 
                 Ok::<_, io::Error>(exit_status)