diff --git a/package.json b/package.json
index fe69b1d..55654a7 100644
--- a/package.json
+++ b/package.json
@@ -2,14 +2,15 @@
   "name": "maplibre-contour",
   "version": "0.0.7",
   "description": "Render contour lines from raster elevation tiles in maplibre-gl-js",
-  "browser": "dist/index.min.js",
   "unpkg": "dist/index.min.js",
   "main": "dist/index.cjs",
   "module": "dist/index.mjs",
   "types": "dist/index.d.ts",
   "exports": {
     "module": "./dist/index.mjs",
-    "require": "./dist/index.cjs"
+    "require": "./dist/index.cjs",
+    "types": "./dist/index.d.ts",
+    "browser": "./dist/index.min.js"
   },
   "scripts": {
     "bench": "npm run build && node benchmark.js",
diff --git a/src/actor.ts b/src/actor.ts
index 9a55e4f..7254722 100644
--- a/src/actor.ts
+++ b/src/actor.ts
@@ -1,5 +1,5 @@
 import { Timer } from "./performance";
-import { IsTransferrable, Timing } from "./types";
+import type { IsTransferrable, Timing } from "./types";
 import { onAbort, withTimeout } from "./utils";
 
 let id = 0;
diff --git a/src/decode-image.ts b/src/decode-image.ts
index 44552f4..48c245f 100644
--- a/src/decode-image.ts
+++ b/src/decode-image.ts
@@ -6,7 +6,7 @@ import {
   shouldUseVideoFrame,
 } from "./utils";
 import type { MainThreadDispatch } from "./remote-dem-manager";
-import { DemTile, Encoding } from "./types";
+import type { DemTile, Encoding } from "./types";
 
 let offscreenCanvas: OffscreenCanvas;
 let offscreenContext: OffscreenCanvasRenderingContext2D | null;
diff --git a/src/dem-manager.ts b/src/dem-manager.ts
index b3e2196..3aa97ca 100644
--- a/src/dem-manager.ts
+++ b/src/dem-manager.ts
@@ -3,7 +3,7 @@ import decodeImage from "./decode-image";
 import { HeightTile } from "./height-tile";
 import generateIsolines from "./isolines";
 import { encodeIndividualOptions, isAborted, withTimeout } from "./utils";
-import {
+import type {
   ContourTile,
   DemTile,
   Encoding,
diff --git a/src/dem-source.ts b/src/dem-source.ts
index aed0fef..dfe9d73 100644
--- a/src/dem-source.ts
+++ b/src/dem-source.ts
@@ -1,7 +1,8 @@
-import { DemManager, LocalDemManager } from "./dem-manager";
+import type { DemManager } from "./dem-manager";
+import { LocalDemManager } from "./dem-manager";
 import { decodeOptions, encodeOptions, getOptionsForZoom } from "./utils";
 import RemoteDemManager from "./remote-dem-manager";
-import { DemTile, GlobalContourTileOptions, Timing } from "./types";
+import type { DemTile, GlobalContourTileOptions, Timing } from "./types";
 import type WorkerDispatch from "./worker-dispatch";
 import Actor from "./actor";
 import { Timer } from "./performance";
diff --git a/src/e2e.test.ts b/src/e2e.test.ts
index f194574..5ad3fa5 100644
--- a/src/e2e.test.ts
+++ b/src/e2e.test.ts
@@ -3,7 +3,7 @@ import Actor from "./actor";
 import WorkerDispatch from "./worker-dispatch";
 import { DemSource } from "./dem-source";
 import { MainThreadDispatch } from "./remote-dem-manager";
-import { DemTile, Timing } from "./types";
+import type { DemTile, Timing } from "./types";
 import { VectorTile } from "@mapbox/vector-tile";
 import Pbf from "pbf";
 
diff --git a/src/height-tile.ts b/src/height-tile.ts
index be87b0e..ec8944c 100644
--- a/src/height-tile.ts
+++ b/src/height-tile.ts
@@ -1,4 +1,4 @@
-import { DemTile } from "./types";
+import type { DemTile } from "./types";
 
 const MIN_VALID_M = -12000;
 const MAX_VALID_M = 9000;
diff --git a/src/performance.ts b/src/performance.ts
index f7ace27..9d786d1 100644
--- a/src/performance.ts
+++ b/src/performance.ts
@@ -1,4 +1,4 @@
-import { Timing, TimingCategory } from "./types";
+import type { Timing, TimingCategory } from "./types";
 
 export const perf =
   typeof performance !== "undefined" ? performance : undefined;
diff --git a/src/remote-dem-manager.ts b/src/remote-dem-manager.ts
index fd7eb71..4811758 100644
--- a/src/remote-dem-manager.ts
+++ b/src/remote-dem-manager.ts
@@ -4,7 +4,7 @@ import type WorkerDispatch from "./worker-dispatch";
 import decodeImage from "./decode-image";
 import type { DemManager } from "./dem-manager";
 import { Timer } from "./performance";
-import {
+import type {
   ContourTile,
   DemTile,
   Encoding,
diff --git a/src/utils.test.ts b/src/utils.test.ts
index e8981ce..65eafbc 100644
--- a/src/utils.test.ts
+++ b/src/utils.test.ts
@@ -1,4 +1,4 @@
-import {
+import type {
   GlobalContourTileOptions,
   IndividualContourTileOptions,
 } from "./types";
diff --git a/src/utils.ts b/src/utils.ts
index dab5ef8..1df372b 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,4 +1,4 @@
-import {
+import type {
   ContourTile,
   DemTile,
   GlobalContourTileOptions,
diff --git a/src/worker-dispatch.ts b/src/worker-dispatch.ts
index 011eba1..4021f22 100644
--- a/src/worker-dispatch.ts
+++ b/src/worker-dispatch.ts
@@ -1,6 +1,6 @@
 import { LocalDemManager } from "./dem-manager";
 import { Timer } from "./performance";
-import {
+import type {
   ContourTile,
   FetchResponse,
   IndividualContourTileOptions,
diff --git a/test-project-maplibre-3/tsconfig.json b/test-project-maplibre-3/tsconfig.json
index 3c43903..e6f83d5 100644
--- a/test-project-maplibre-3/tsconfig.json
+++ b/test-project-maplibre-3/tsconfig.json
@@ -1,3 +1,4 @@
 {
-  "extends": "../tsconfig.json"
+  "extends": "../tsconfig.json",
+  "include": ["*.ts"]
 }
diff --git a/test-project/tsconfig.json b/test-project/tsconfig.json
index 3c43903..e6f83d5 100644
--- a/test-project/tsconfig.json
+++ b/test-project/tsconfig.json
@@ -1,3 +1,4 @@
 {
-  "extends": "../tsconfig.json"
+  "extends": "../tsconfig.json",
+  "include": ["*.ts"]
 }
diff --git a/tsconfig.json b/tsconfig.json
index bb8ca2b..80543f7 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,14 +3,15 @@
     "target": "ES2016",
     "lib": ["ESNext", "DOM", "DOM.Iterable"],
     "strict": true,
-    "moduleResolution": "node",
+    "moduleResolution": "Bundler",
     "allowJs": true,
     "skipLibCheck": false,
     "types": ["jest", "node"],
     "allowSyntheticDefaultImports": true,
     "isolatedModules": true,
     "module": "ESNext",
-    "esModuleInterop": true
+    "esModuleInterop": true,
+    "verbatimModuleSyntax": true
   },
   "ts-node": {
     "experimentalSpecifierResolution": "node",