diff --git a/src/client/dom/cookie.ts b/src/client/dom/cookie.ts
index ccffd7a..85c3f54 100644
--- a/src/client/dom/cookie.ts
+++ b/src/client/dom/cookie.ts
@@ -1,12 +1,28 @@
 import { ScramjetClient } from "../client";
 
 export default function (client: ScramjetClient, self: typeof window) {
+	client.serviceworker.addEventListener("message", ({ data }) => {
+		if (!("scramjet$type" in data)) return;
+
+		if (data.scramjet$type === "cookie") {
+			this.cookieStore.setCookies([data.cookie], new URL(data.url));
+			return;
+		}
+	});
+
 	client.Trap("Document.prototype.cookie", {
 		get() {
 			return client.cookieStore.getCookies(client.url, true);
 		},
 		set(ctx, value: string) {
 			client.cookieStore.setCookies([value], client.url);
+
+			// TODO hardcode because scoping whatever
+			client.serviceworker.controller!.postMessage({
+				scramjet$type: "cookie",
+				cookie: value,
+				url: client.url.href,
+			});
 		},
 	});
 
diff --git a/src/client/index.ts b/src/client/index.ts
index 4d3c30c..7de8dd5 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -16,8 +16,7 @@ dbg.log("scrammin");
 if (!(ScramjetClient.SCRAMJET in self)) {
 	const client = new ScramjetClient(self);
 
-	client.loadcookies(self.COOKIE);
-	delete self.COOKIE;
+	if (self.COOKIE) client.loadcookies(self.COOKIE);
 
 	client.hook();
 
diff --git a/src/worker/index.ts b/src/worker/index.ts
index 6bbfe81..2a730c4 100644
--- a/src/worker/index.ts
+++ b/src/worker/index.ts
@@ -31,12 +31,16 @@ export class ScramjetServiceWorker {
 
 			if (data.scramjet$type === "registerServiceWorker") {
 				this.serviceWorkers.push(new FakeServiceWorker(data.port, data.origin));
-
 				return;
 			}
 
-			const resolve = this.syncPool[data.scramjet$token];
-			delete this.syncPool[data.scramjet$token];
+			if (data.scramjet$type === "cookie") {
+				this.cookieStore.setCookies([data.cookie], new URL(data.url));
+				return;
+			}
+
+			// const resolve = this.syncPool[data.scramjet$token];
+			// delete this.syncPool[data.scramjet$token];
 		});
 	}
 
@@ -119,13 +123,19 @@ type RegisterServiceWorkerMessage = {
 	origin: string;
 };
 
+type CookieMessage = {
+	scramjet$type: "cookie";
+	cookie: string;
+	url: string;
+};
+
 type MessageCommon = {
 	scramjet$type: string;
 	scramjet$token: number;
 };
 
-type MessageTypeC2W = RegisterServiceWorkerMessage;
-type MessageTypeW2C = never;
+type MessageTypeC2W = RegisterServiceWorkerMessage | CookieMessage;
+type MessageTypeW2C = CookieMessage;
 
 // c2w: client to (service) worker
 export type MessageC2W = MessageCommon & MessageTypeC2W;