diff --git a/src/Request.ts b/src/Request.ts
index 4869ea0..ad312bd 100644
--- a/src/Request.ts
+++ b/src/Request.ts
@@ -1,6 +1,6 @@
+import {Multipart} from "multipart-ts";
 import http, {OutgoingHttpHeader} from "node:http";
 import stream from "node:stream";
-import {Multipart} from "multipart-ts";
 
 /**
  * An incoming HTTP request from a connected client.
@@ -33,7 +33,12 @@ export class Request {
      * @param headers See {@link Request#headers}.
      * @param bodyStream See {@link Request#bodyStream}.
      */
-    protected constructor(method: Request["method"], url: Request["url"], headers: Request["headers"], bodyStream: Request["bodyStream"]) {
+    protected constructor(
+        method: Request["method"],
+        url: Request["url"],
+        headers: Request["headers"],
+        bodyStream: Request["bodyStream"],
+    ) {
         this.method = method;
         this.url = url;
         this.headers = headers;
@@ -45,8 +50,14 @@ export class Request {
      * @throws {@link Request.BadUrlError} If the request URL is invalid.
      */
     public static incomingMessage(incomingMessage: http.IncomingMessage) {
-        const auth = incomingMessage.headers.authorization?.toLowerCase().startsWith("basic ")
-            ? Buffer.from(incomingMessage.headers.authorization.substring("basic ".length), "base64").toString()
+        const auth =
+            incomingMessage.headers.authorization
+                ?.toLowerCase()
+                .startsWith("basic ")
+            ? Buffer.from(
+                incomingMessage.headers.authorization
+                    .substring("basic ".length), "base64"
+            ).toString()
             : null;
 
         const url = `http://${auth ? `${auth}@` : ""}${process.env.HOST ?? "localhost"}${incomingMessage.url ?? "/"}`;
@@ -55,12 +66,21 @@ export class Request {
 
         const headers = Request.headersFromNodeDict(incomingMessage.headers);
 
-        return new Request(
-            incomingMessage.method as Request.Method,
-            new URL(url),
-            headers,
-            incomingMessage
-        )
+        return new Request(incomingMessage.method as Request.Method, new URL(url), headers, incomingMessage);
+    }
+
+    /**
+     * @internal
+     */
+    public static headersFromNodeDict(headers: Record<string, OutgoingHttpHeader | undefined>): Headers {
+        return new Headers(Object.entries(headers)
+            .filter((e) => e[1] !== undefined)
+            .flatMap<[string, string]>(([key, value]) =>
+                value instanceof Array
+                ? value.map<[string, string]>(v => [key, v])
+                : [[key, String(value)]]
+            )
+        );
     }
 
     /**
@@ -135,19 +155,6 @@ export class Request {
     public async text(): Promise<string> {
         return (await this.blob()).text();
     }
-
-    /**
-     * @internal
-     */
-    public static headersFromNodeDict(headers: Record<string, OutgoingHttpHeader | undefined>): Headers {
-        return new Headers(
-            (Object.entries(headers)
-                .filter(([, v]) => v !== undefined) as [string, Exclude<typeof headers[string], undefined>][])
-                .flatMap<[string, string]>(([key, value]) =>value instanceof Array
-                    ? value.map<[string, string]>(v => [key, v])
-                    : [[key, String(value)]])
-        );
-    }
 }
 
 export namespace Request {
diff --git a/src/ServerErrorRegistry.ts b/src/ServerErrorRegistry.ts
index a679732..1f35b9d 100644
--- a/src/ServerErrorRegistry.ts
+++ b/src/ServerErrorRegistry.ts
@@ -7,24 +7,41 @@ import {TextResponse} from "./response/TextResponse.js";
 class ServerErrorRegistry {
     private readonly responses: Record<ServerErrorRegistry.ErrorCodes, Response>;
 
+    /**
+     * Create a new server error registry initialised with default responses.
+     */
+    public constructor() {
+        this.responses = {
+            [ServerErrorRegistry.ErrorCodes.BAD_URL]:
+                new TextResponse("Bad request URL.", 400),
+
+            [ServerErrorRegistry.ErrorCodes.NO_ROUTE]:
+                new TextResponse("No route in this registry matches the request.", 404),
+
+            [ServerErrorRegistry.ErrorCodes.INTERNAL]:
+                new TextResponse("An internal error occurred.", 500),
+        };
+    }
+
+    /**
+     * Replace server error response by registering a new custom response.
+     * @param code The server error code.
+     * @param response The response to send.
+     */
     public register(code: ServerErrorRegistry.ErrorCodes, response: Response) {
         this.responses[code] = response;
     }
 
+    /** @internal */
     public _get(code: ServerErrorRegistry.ErrorCodes): Response {
         return this.responses[code];
     }
-
-    public constructor() {
-        this.responses = {
-            [ServerErrorRegistry.ErrorCodes.BAD_URL]: new TextResponse("Bad request URL.", 400),
-            [ServerErrorRegistry.ErrorCodes.NO_ROUTE]: new TextResponse("No route in this registry matches the request.", 404),
-            [ServerErrorRegistry.ErrorCodes.INTERNAL]: new TextResponse("An internal error occurred.", 500),
-        };
-    }
 }
 
 namespace ServerErrorRegistry {
+    /**
+     * Server error codes
+     */
     export const enum ErrorCodes {
         BAD_URL,
         NO_ROUTE,
diff --git a/src/response/JsonResponse.ts b/src/response/JsonResponse.ts
index b75b362..00b0935 100644
--- a/src/response/JsonResponse.ts
+++ b/src/response/JsonResponse.ts
@@ -17,8 +17,8 @@ export class JsonResponse<T> extends TextResponse {
                 return v.toISOString();
             if (typeof v === "bigint")
                 return v <= BigInt(Number.MAX_SAFE_INTEGER)
-                    ? Number(v)
-                    : v.toString();
+                       ? Number(v)
+                       : v.toString();
             return v;
         }));
     }
diff --git a/src/response/Response.ts b/src/response/Response.ts
index cc4def5..1feb840 100644
--- a/src/response/Response.ts
+++ b/src/response/Response.ts
@@ -26,6 +26,13 @@ export abstract class Response {
         this.headers = new Headers(headers);
     }
 
+    /**
+     * @internal
+     */
+    public _send(...args: Parameters<Response["send"]>): ReturnType<Response["send"]> {
+        return this.send(...args);
+    }
+
     /**
      * Set the HTTP response status code and headers.
      */
@@ -38,11 +45,4 @@ export abstract class Response {
      * Called once by the server to send the response.
      */
     protected abstract send(res: http.ServerResponse, server: Server, req?: Request): void | Promise<void>;
-
-    /**
-     * @internal
-     */
-    public _send(...args: Parameters<Response["send"]>): ReturnType<Response["send"]> {
-        return this.send(...args);
-    }
 }