diff --git a/package.json b/package.json
index 6f3aab8..ced6ef1 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
   "main": "./dist/ktx-parse.cjs",
   "module": "./dist/ktx-parse.esm.js",
   "exports": {
+    "types": "./dist/index.d.ts",
     "require": "./dist/ktx-parse.cjs",
     "default": "./dist/ktx-parse.modern.js"
   },
diff --git a/src/container.ts b/src/container.ts
index 44e16b2..af7e3c0 100644
--- a/src/container.ts
+++ b/src/container.ts
@@ -8,7 +8,7 @@ import {
 	KHR_DF_VERSION,
 	KHR_SUPERCOMPRESSION_NONE,
 	VK_FORMAT_UNDEFINED,
-} from './constants';
+} from './constants.js';
 
 /**
  * Represents an unpacked KTX 2.0 texture container. Data for individual mip levels are stored in
diff --git a/src/index.ts b/src/index.ts
index 5ca8599..fae7787 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,4 @@
-export * from './container';
-export * from './constants';
-export * from './read';
-export * from './write';
+export * from './container.js';
+export * from './constants.js';
+export * from './read.js';
+export * from './write.js';
diff --git a/src/read.ts b/src/read.ts
index 6a148eb..42575e5 100644
--- a/src/read.ts
+++ b/src/read.ts
@@ -1,8 +1,8 @@
-import { BufferReader } from './buffer-reader';
-import { KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants';
-import { KTX2_ID } from './constants-internal';
-import { KTX2Container, KTX2DataFormatDescriptorBasicFormat } from './container';
-import { decodeText } from './util';
+import { BufferReader } from './buffer-reader.js';
+import { KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants.js';
+import { KTX2_ID } from './constants-internal.js';
+import { KTX2Container, KTX2DataFormatDescriptorBasicFormat } from './container.js';
+import { decodeText } from './util.js';
 
 /**
  * Parses a KTX 2.0 file, returning an unpacked {@link KTX2Container} instance with all associated
diff --git a/src/write.ts b/src/write.ts
index 8c8438c..562082d 100644
--- a/src/write.ts
+++ b/src/write.ts
@@ -1,7 +1,7 @@
-import { HEADER_BYTE_LENGTH, KTX2_ID, KTX_WRITER, NUL } from './constants-internal';
-import { KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT, KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants';
-import { KTX2Container } from './container';
-import { concat, encodeText } from './util';
+import { HEADER_BYTE_LENGTH, KTX2_ID, KTX_WRITER, NUL } from './constants-internal.js';
+import { KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT, KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants.js';
+import { KTX2Container } from './container.js';
+import { concat, encodeText } from './util.js';
 
 interface WriteOptions {
 	keepWriter?: boolean;
diff --git a/tsconfig.json b/tsconfig.json
index d3d5963..6dfc460 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,7 @@
     "paths": {
       "ktx-parse": ["./"]
     },
-    "moduleResolution": "node",
+    "moduleResolution": "nodenext",
     "lib": ["es2020", "dom"],
     "target": "es2020",
     "module": "es2020",