diff --git a/napi/src/task.rs b/napi/src/task.rs
index 9747cddf..af36c6f6 100644
--- a/napi/src/task.rs
+++ b/napi/src/task.rs
@@ -1,7 +1,7 @@
 use crate::js_values::NapiValue;
 use crate::{Env, Result};
 
-pub trait Task {
+pub trait Task: Send {
   type Output: Send + Sized + 'static;
   type JsValue: NapiValue;