diff --git a/.auri/$ymzad0k8.md b/.auri/$ymzad0k8.md
new file mode 100644
index 000000000..f6d7319a9
--- /dev/null
+++ b/.auri/$ymzad0k8.md
@@ -0,0 +1,6 @@
+---
+package: "lucia" # package name
+type: "patch" # "major", "minor", "patch"
+---
+
+Remove dev dependencies for typing
\ No newline at end of file
diff --git a/packages/lucia/package.json b/packages/lucia/package.json
index c8028880c..1261c2603 100644
--- a/packages/lucia/package.json
+++ b/packages/lucia/package.json
@@ -50,10 +50,7 @@
 	"author": "pilcrowonpaper",
 	"license": "MIT",
 	"devDependencies": {
-		"@sveltejs/kit": "1.10.0",
-		"@types/express": "^4.17.17",
 		"@types/node": "^18.6.2",
-		"fastify": "^4.21.0",
 		"prettier": "^2.3.0",
 		"vitest": "^0.33.0"
 	}
diff --git a/packages/lucia/src/middleware/index.ts b/packages/lucia/src/middleware/index.ts
index c386f0b21..fa8d368ad 100644
--- a/packages/lucia/src/middleware/index.ts
+++ b/packages/lucia/src/middleware/index.ts
@@ -7,18 +7,19 @@ import type {
 	RequestContext
 } from "../auth/request.js";
 
-import type {
-	IncomingMessage,
-	OutgoingMessage,
-	ServerResponse
-} from "node:http";
-import type {
-	Request as ExpressRequest,
-	Response as ExpressResponse
-} from "express";
-import type { FastifyReply, FastifyRequest } from "fastify";
+type NodeIncomingMessage = {
+	method?: string;
+	headers: Record<string, string | string[] | undefined>;
+};
 
-export const node = (): Middleware<[IncomingMessage, OutgoingMessage]> => {
+type NodeOutGoingMessage = {
+	getHeader: (name: string) => string | string[] | number | undefined;
+	setHeader: (name: string, value: string | number | readonly string[]) => void;
+};
+
+export const node = (): Middleware<
+	[NodeIncomingMessage, NodeOutGoingMessage]
+> => {
 	return ({ args }) => {
 		const [incomingMessage, outgoingMessage] = args;
 		const requestContext = {
@@ -27,16 +28,16 @@ export const node = (): Middleware<[IncomingMessage, OutgoingMessage]> => {
 				headers: createHeadersFromObject(incomingMessage.headers)
 			},
 			setCookie: (cookie) => {
-				const setCookieHeaderValues =
-					outgoingMessage
-						.getHeader("Set-Cookie")
-						?.toString()
-						.split(",")
-						.filter((val) => val) ?? [];
-
+				let parsedSetCookieHeaderValues: string[] = [];
+				const setCookieHeaderValue = outgoingMessage.getHeader("Set-Cookie");
+				if (typeof setCookieHeaderValue === "string") {
+					parsedSetCookieHeaderValues = [setCookieHeaderValue];
+				} else if (Array.isArray(setCookieHeaderValue)) {
+					parsedSetCookieHeaderValues = setCookieHeaderValue;
+				}
 				outgoingMessage.setHeader("Set-Cookie", [
 					cookie.serialize(),
-					...setCookieHeaderValues
+					...parsedSetCookieHeaderValues
 				]);
 			}
 		} as const satisfies RequestContext;
@@ -45,6 +46,15 @@ export const node = (): Middleware<[IncomingMessage, OutgoingMessage]> => {
 	};
 };
 
+type ExpressRequest = {
+	method: string;
+	headers: Record<string, string | string[] | undefined>;
+};
+
+type ExpressResponse = {
+	cookie: (name: string, val: string, options?: CookieAttributes) => void;
+};
+
 export const express = (): Middleware<[ExpressRequest, ExpressResponse]> => {
 	return ({ args }) => {
 		const [req, res] = args;
@@ -61,6 +71,15 @@ export const express = (): Middleware<[ExpressRequest, ExpressResponse]> => {
 	};
 };
 
+type FastifyRequest = {
+	method: string;
+	headers: Record<string, string | string[] | undefined>;
+};
+
+type FastifyReply = {
+	header: (name: string, val: any) => void;
+};
+
 export const fastify = (): Middleware<[FastifyRequest, FastifyReply]> => {
 	return ({ args }) => {
 		const [req, res] = args;
@@ -197,8 +216,8 @@ export const web = (): Middleware<[Request]> => {
 };
 
 type NextJsPagesServerContext = {
-	req: IncomingMessage;
-	res?: OutgoingMessage;
+	req: NodeIncomingMessage;
+	res?: NodeOutGoingMessage;
 };
 
 type NextCookie =
@@ -362,8 +381,8 @@ export const nextjs_future = (): Middleware<
 
 type H3Event = {
 	node: {
-		req: IncomingMessage;
-		res: ServerResponse;
+		req: NodeIncomingMessage;
+		res: NodeOutGoingMessage;
 	};
 };