diff --git a/Cargo.lock b/Cargo.lock
index 85a124e..6017b15 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "cli"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "core",
  "serde_json",
@@ -12,7 +12,7 @@ dependencies = [
 
 [[package]]
 name = "core"
-version = "0.5.2"
+version = "0.5.3"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index f6ec794..4df2f00 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cli"
-version = "0.5.2"
+version = "0.5.3"
 edition.workspace = true
 license.workspace = true
 repository.workspace = true
diff --git a/crates/core/Cargo.toml b/crates/core/Cargo.toml
index e8f5e3a..6d7be9d 100644
--- a/crates/core/Cargo.toml
+++ b/crates/core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "core"
-version = "0.5.2"
+version = "0.5.3"
 edition.workspace = true
 license.workspace = true
 repository.workspace = true
diff --git a/crates/core/src/runtime/process.rs b/crates/core/src/runtime/process.rs
index e5fc566..81db9ed 100644
--- a/crates/core/src/runtime/process.rs
+++ b/crates/core/src/runtime/process.rs
@@ -156,6 +156,9 @@ pub fn parse(text: &str) -> Vec<(u32, String)> {
 pub fn stop(pid: u32) -> Result<(), String> {
     #[cfg(unix)]
     {
+        if !exists(pid) {
+            return Ok(());
+        }
         let group = Command::new("kill")
             .args(["-TERM", "--", &format!("-{pid}")])
             .stdout(Stdio::null())
@@ -172,7 +175,7 @@ pub fn stop(pid: u32) -> Result<(), String> {
             .stderr(Stdio::null())
             .status()
             .map_err(|err| format!("kill failed: {err}"))?;
-        if status.success() {
+        if status.success() || !exists(pid) {
             Ok(())
         } else {
             Err(format!(
diff --git a/crates/core/tests/process.rs b/crates/core/tests/process.rs
index 4caae6b..a5511b9 100644
--- a/crates/core/tests/process.rs
+++ b/crates/core/tests/process.rs
@@ -69,3 +69,15 @@ fn brokers() {
     assert_eq!(hits.len(), 1);
     assert_eq!(hits[0].pid, 10);
 }
+
+#[cfg(unix)]
+#[test]
+fn gone() {
+    let mut child = std::process::Command::new("sh")
+        .args(["-c", "exit 0"])
+        .spawn()
+        .expect("child should spawn");
+    let pid = child.id();
+    child.wait().expect("child should exit");
+    assert!(process::stop(pid).is_ok());
+}