diff --git a/packages/iceshrimp-js/package.json b/packages/iceshrimp-js/package.json
index f00b5796a..fe993b940 100644
--- a/packages/iceshrimp-js/package.json
+++ b/packages/iceshrimp-js/package.json
@@ -5,7 +5,7 @@
 	"main": "./built/index.js",
 	"types": "./built/index.d.ts",
 	"scripts": {
-		"build": "swc src -d built -D",
+		"build": "tsc",
 		"build:debug": "swc src -d built -s -D",
 		"render": "yarn build && yarn api && yarn api-prod && cp temp/iceshrimp-js.api.json etc/ && yarn api-doc",
 		"tsd": "tsc && tsd",
diff --git a/packages/iceshrimp-js/src/api.ts b/packages/iceshrimp-js/src/api.ts
index 141aa4b85..f3182d091 100644
--- a/packages/iceshrimp-js/src/api.ts
+++ b/packages/iceshrimp-js/src/api.ts
@@ -1,4 +1,4 @@
-import { Endpoints } from "./api.types";
+import { Endpoints } from "./api.types.js";
 
 const MK_API_ERROR = Symbol();
 
diff --git a/packages/iceshrimp-js/src/api.types.ts b/packages/iceshrimp-js/src/api.types.ts
index 9bad7ec2d..0c4ec3c42 100644
--- a/packages/iceshrimp-js/src/api.types.ts
+++ b/packages/iceshrimp-js/src/api.types.ts
@@ -34,7 +34,7 @@ import {
 	NoteReaction,
 	Signin,
 	MessagingMessage,
-} from "./entities";
+} from "./entities.js";
 
 type TODO = Record<string, any> | null;
 
diff --git a/packages/iceshrimp-js/src/index.ts b/packages/iceshrimp-js/src/index.ts
index a909d4b32..0247b28f2 100644
--- a/packages/iceshrimp-js/src/index.ts
+++ b/packages/iceshrimp-js/src/index.ts
@@ -1,8 +1,8 @@
-import { Endpoints } from "./api.types";
-import Stream, { Connection } from "./streaming";
-import { Channels } from "./streaming.types";
-import { Acct } from "./acct";
-import * as consts from "./consts";
+import { Endpoints } from "./api.types.js";
+import Stream, { Connection } from "./streaming.js";
+import { Channels } from "./streaming.types.js";
+import { Acct } from "./acct.js";
+import * as consts from "./consts.js";
 
 export { Endpoints, Stream, Connection as ChannelConnection, Channels, Acct };
 
@@ -14,6 +14,6 @@ export const ffVisibility = consts.ffVisibility;
 // api extractor not supported yet
 //export * as api from './api';
 //export * as entities from './entities';
-import * as api from "./api";
-import * as entities from "./entities";
+import * as api from "./api.js";
+import * as entities from "./entities.js";
 export { api, entities };
diff --git a/packages/iceshrimp-js/src/streaming.ts b/packages/iceshrimp-js/src/streaming.ts
index 924e33a45..6f093bdb2 100644
--- a/packages/iceshrimp-js/src/streaming.ts
+++ b/packages/iceshrimp-js/src/streaming.ts
@@ -1,6 +1,6 @@
 import { EventEmitter } from "eventemitter3";
 import ReconnectingWebsocket from "reconnecting-websocket";
-import { BroadcastEvents, Channels } from "./streaming.types";
+import { BroadcastEvents, Channels } from "./streaming.types.js";
 
 function autobind(instance: any): void {
 	const prototype = Object.getPrototypeOf(instance);
diff --git a/packages/iceshrimp-js/src/streaming.types.ts b/packages/iceshrimp-js/src/streaming.types.ts
index c0b0b030c..6a3da4ddd 100644
--- a/packages/iceshrimp-js/src/streaming.types.ts
+++ b/packages/iceshrimp-js/src/streaming.types.ts
@@ -9,7 +9,7 @@ import type {
 	PageEvent,
 	User,
 	UserGroup,
-} from "./entities";
+} from "./entities.js";
 
 type FIXME = any;
 
diff --git a/packages/iceshrimp-js/tsconfig.json b/packages/iceshrimp-js/tsconfig.json
index 642bcc45b..e2b755075 100644
--- a/packages/iceshrimp-js/tsconfig.json
+++ b/packages/iceshrimp-js/tsconfig.json
@@ -1,8 +1,9 @@
 {
 	"$schema": "http://json.schemastore.org/tsconfig",
 	"compilerOptions": {
-		"target": "es2020",
-		"module": "commonjs",
+		"target": "ES2022",
+		"module": "nodenext",
+		"moduleResolution": "nodenext",
 		"declaration": true,
 		"declarationMap": true,
 		"sourceMap": true,
@@ -13,8 +14,20 @@
 		"strictNullChecks": true,
 		"experimentalDecorators": true,
 		"noImplicitReturns": true,
-		"esModuleInterop": true
+		"esModuleInterop": true,
+		"typeRoots": [
+			"./node_modules/@types"
+		],
+		"lib": [
+			"esnext",
+			"dom"
+		]
 	},
-	"include": ["src/**/*"],
-	"exclude": ["node_modules", "test/**/*"]
+	"include": [
+		"src/**/*"
+	],
+	"exclude": [
+		"node_modules",
+		"test/**/*"
+	]
 }