diff --git a/lib/worker.js b/lib/worker.js
index 51c1a40ecbda7f3a224109a5454bef544ac7f3e3..59c5061987bf5962fef590ce7c2ab068491bd2d4 100644
--- a/lib/worker.js
+++ b/lib/worker.js
@@ -59,7 +59,7 @@ process.once("message", function (obj) {
 		}
 	};
 
-	Reflect.ownKeys(global.self).forEach(function (key) {
+	Object.keys(global.self).forEach(function (key) {
 		global[key] = global.self[key];
 	});
 
diff --git a/src/worker.js b/src/worker.js
index 5ee73ff13058de37a06beab117fc6df52f7c21d9..478264dcba181f41027c13975a7df7b7cc9fb516 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -51,7 +51,7 @@ process.once("message", obj => {
 		}
 	};
 
-	Reflect.ownKeys(global.self).forEach(key => {
+	Object.keys(global.self).forEach(key => {
 		global[key] = global.self[key];
 	});