diff --git a/packages/manager/package.json b/packages/manager/package.json
index 8cbc99109..4c098fdfd 100644
--- a/packages/manager/package.json
+++ b/packages/manager/package.json
@@ -71,7 +71,7 @@
 		"@prismicio/types-internal": "^2.8.0",
 		"@segment/analytics-node": "^2.1.2",
 		"@slicemachine/plugin-kit": "workspace:*",
-		"cookie": "^0.5.0",
+		"cookie": "^1.0.1",
 		"cors": "^2.8.5",
 		"execa": "^7.1.1",
 		"file-type": "^18.2.1",
@@ -95,7 +95,6 @@
 		"@amplitude/experiment-node-server": "1.8.1",
 		"@prismicio/mock": "0.2.0",
 		"@size-limit/preset-small-lib": "8.2.4",
-		"@types/cookie": "0.5.1",
 		"@types/express": "4.17.17",
 		"@types/semver": "7.3.13",
 		"@typescript-eslint/eslint-plugin": "5.55.0",
diff --git a/packages/manager/src/lib/serializeCookies.ts b/packages/manager/src/lib/serializeCookies.ts
index 6eea443ee..66bb41416 100644
--- a/packages/manager/src/lib/serializeCookies.ts
+++ b/packages/manager/src/lib/serializeCookies.ts
@@ -4,7 +4,9 @@ const COOKIE_SEPARATOR = "; ";
 
 type Cookies = string | string[] | Record<string, string>;
 
-const castParsedCookies = (cookies: Cookies): Record<string, string> => {
+const castParsedCookies = (
+	cookies: Cookies,
+): Record<string, string | undefined> => {
 	if (Array.isArray(cookies)) {
 		return cookie.parse(cookies.join(COOKIE_SEPARATOR));
 	} else if (typeof cookies === "string") {
@@ -33,12 +35,15 @@ export const serializeCookies = (
 	const items: string[] = [];
 
 	for (const name in cookiesToSerialize) {
-		items.push(
-			cookie.serialize(name, cookiesToSerialize[name], {
-				// Cookies need be stored raw (not encoded or escaped), so that consumers can format them the way they want them to be formatted.
-				encode: (cookie) => cookie,
-			}),
-		);
+		const cookieValue = cookiesToSerialize[name];
+		if (cookieValue) {
+			items.push(
+				cookie.serialize(name, cookieValue, {
+					// Cookies need be stored raw (not encoded or escaped), so that consumers can format them the way they want them to be formatted.
+					encode: (cookie) => cookie,
+				}),
+			);
+		}
 	}
 
 	return items.join(COOKIE_SEPARATOR);
diff --git a/packages/manager/test/PrismicAuthManager-getAuthenticationCookies.test.ts b/packages/manager/test/PrismicAuthManager-getAuthenticationCookies.test.ts
index 77c710d01..7d6c23d5f 100644
--- a/packages/manager/test/PrismicAuthManager-getAuthenticationCookies.test.ts
+++ b/packages/manager/test/PrismicAuthManager-getAuthenticationCookies.test.ts
@@ -19,7 +19,7 @@ it("returns parsed cookies from the auth state file", async (ctx) => {
 	const authenticationCookies =
 		await prismicAuthManager.getAuthenticationCookies();
 
-	expect(authenticationCookies).toStrictEqual({
+	expect(authenticationCookies).toEqual({
 		"prismic-auth": "token",
 		SESSION: "session",
 	});
diff --git a/packages/manager/test/SliceMachineManager-user-getAuthenticationCookies.test.ts b/packages/manager/test/SliceMachineManager-user-getAuthenticationCookies.test.ts
index f47e9a7d4..8f58368f5 100644
--- a/packages/manager/test/SliceMachineManager-user-getAuthenticationCookies.test.ts
+++ b/packages/manager/test/SliceMachineManager-user-getAuthenticationCookies.test.ts
@@ -25,7 +25,7 @@ it("returns parsed cookies from the auth state file", async (ctx) => {
 
 	const authenticationCookies = await manager.user.getAuthenticationCookies();
 
-	expect(authenticationCookies).toStrictEqual({
+	expect(authenticationCookies).toEqual({
 		"prismic-auth": "token",
 		SESSION: "session",
 	});
diff --git a/yarn.lock b/yarn.lock
index c9e7f19ce..7c373715f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9235,13 +9235,12 @@ __metadata:
     "@segment/analytics-node": ^2.1.2
     "@size-limit/preset-small-lib": 8.2.4
     "@slicemachine/plugin-kit": "workspace:*"
-    "@types/cookie": 0.5.1
     "@types/express": 4.17.17
     "@types/semver": 7.3.13
     "@typescript-eslint/eslint-plugin": 5.55.0
     "@typescript-eslint/parser": 5.55.0
     "@vitest/coverage-v8": 0.32.0
-    cookie: ^0.5.0
+    cookie: ^1.0.1
     cors: ^2.8.5
     depcheck: 1.4.3
     eslint: 8.37.0
@@ -11082,13 +11081,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/cookie@npm:0.5.1":
-  version: 0.5.1
-  resolution: "@types/cookie@npm:0.5.1"
-  checksum: 9a8d60fc84797122bc399d6bd330fe5780dc7aab032321de705049ea925339f74658bfa418de483a625d51858770efef58df633ff2e20f1bdf7fbd74a52847e2
-  languageName: node
-  linkType: hard
-
 "@types/cookie@npm:^0.4.1":
   version: 0.4.1
   resolution: "@types/cookie@npm:0.4.1"
@@ -15880,10 +15872,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"cookie@npm:^0.5.0":
-  version: 0.5.0
-  resolution: "cookie@npm:0.5.0"
-  checksum: 1f4bd2ca5765f8c9689a7e8954183f5332139eb72b6ff783d8947032ec1fdf43109852c178e21a953a30c0dd42257828185be01b49d1eb1a67fd054ca588a180
+"cookie@npm:^1.0.1":
+  version: 1.0.1
+  resolution: "cookie@npm:1.0.1"
+  checksum: e2ff4879d816ea27dab69651c06d328b1f4214ccefa1023b6ebf85787bc23b3cad777ed51b4e54c01d161c374a05fc86e45e51ee3d9fafb48a836439c56b2458
   languageName: node
   linkType: hard