diff --git a/core/src/external/jq.rs b/core/src/external/jq.rs
index aa0c0cd56..0ca626a48 100644
--- a/core/src/external/jq.rs
+++ b/core/src/external/jq.rs
@@ -29,6 +29,7 @@ pub async fn jq(path: &Path, skip: usize, limit: usize) -> Result<String, PeekEr
 		lines.push('\n');
 	}
 
+	child.start_kill().ok();
 	if skip > 0 && i < skip + limit {
 		Err(PeekError::Exceed(i.saturating_sub(limit)))
 	} else {
diff --git a/core/src/external/unar.rs b/core/src/external/unar.rs
index 77270ba6c..94c50124e 100644
--- a/core/src/external/unar.rs
+++ b/core/src/external/unar.rs
@@ -1,7 +1,7 @@
 use std::{path::Path, process::Stdio};
 
 use anyhow::{bail, Result};
-use tokio::{io::{AsyncReadExt, BufReader}, process::Command};
+use tokio::{io::AsyncReadExt, process::Command};
 
 pub async fn unar_head(path: &Path, target: &Path) -> Result<Vec<u8>> {
 	let mut child = Command::new("unar")
@@ -13,10 +13,8 @@ pub async fn unar_head(path: &Path, target: &Path) -> Result<Vec<u8>> {
 		.spawn()?;
 
 	let mut buf = vec![0; 1024];
-	let mut reader = BufReader::new(child.stdout.take().unwrap());
-
-	reader.read(&mut buf).await.ok();
-	child.kill().await.ok();
+	child.stdout.take().unwrap().read(&mut buf).await.ok();
+	child.start_kill().ok();
 
 	if buf.is_empty() {
 		bail!("failed to get head of unar");