diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..25fa621
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+  "typescript.tsdk": "node_modules/typescript/lib"
+}
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..ac4b359
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,85 @@
+type ValueOf<T> = T[keyof T];
+
+export type Dtypes = {
+    "<u1": {
+        name: "uint8";
+        size: 8;
+        arrayConstructor: typeof Uint8Array;
+    };
+    "|u1": {
+        name: "uint8";
+        size: 8;
+        arrayConstructor: typeof Uint8Array;
+    };
+    "<u2": {
+        name: "uint16";
+        size: 16;
+        arrayConstructor: typeof Uint16Array;
+    };
+    "|i1": {
+        name: "int8";
+        size: 8;
+        arrayConstructor: typeof Int8Array;
+    };
+    "<i2": {
+        name: "int16";
+        size: 16;
+        arrayConstructor: typeof Int16Array;
+    };
+    "<u4": {
+        name: "uint32";
+        size: 32;
+        arrayConstructor: typeof Int32Array;
+    };
+    "<i4": {
+        name: "int32";
+        size: 32;
+        arrayConstructor: typeof Int32Array;
+    };
+    "<u8": {
+        name: "uint64";
+        size: 64;
+        arrayConstructor: typeof BigUint64Array;
+    };
+    "<i8": {
+        name: "int64";
+        size: 64;
+        arrayConstructor: typeof BigInt64Array;
+    };
+    "<f4": {
+        name: "float32";
+        size: 32;
+        arrayConstructor: typeof Float32Array;
+    };
+    "<f8": {
+        name: "float64";
+        size: 64;
+        arrayConstructor: typeof Float64Array;
+    };
+};
+
+export type Parsed = ValueOf<{
+    [K in keyof Dtypes]: {
+        dtype: Dtypes[K]["name"];
+        data: InstanceType<Dtypes[K]["arrayConstructor"]>;
+        shape: number[];
+        fortranOrder: boolean;
+    };
+}>;
+
+declare class npyjs {
+
+    constructor(opts?: never);
+
+    dtypes: Dtypes;
+
+    parse(arrayBufferContents: ArrayBuffer): Parsed;
+
+    load(
+        filename: RequestInfo | URL | ArrayBuffer,
+        callback?: (result?: Parsed) => any,
+        fetchArgs?: RequestInit
+    ): Promise<Parsed>;
+}
+
+export default npyjs;
diff --git a/package-lock.json b/package-lock.json
index 023a845..d02c32f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,18 +1,19 @@
 {
     "name": "npyjs",
-    "version": "0.4.0",
+    "version": "0.5.0",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "npyjs",
-            "version": "0.4.0",
+            "version": "0.5.0",
             "license": "Apache-2.0",
             "dependencies": {
                 "cross-fetch": "^3.1.5"
             },
             "devDependencies": {
-                "mocha": "^10.2.0"
+                "mocha": "^10.2.0",
+                "typescript": "4.1.x"
             },
             "engines": {
                 "node": "^12.20.0 || >=14.13.1"
@@ -891,6 +892,19 @@
             "integrity": "sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=",
             "license": "MIT"
         },
+        "node_modules/typescript": {
+            "version": "4.1.6",
+            "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.1.6.tgz",
+            "integrity": "sha512-pxnwLxeb/Z5SP80JDRzVjh58KsM6jZHRAOtTpS7sXLS4ogXNKC9ANxHHZqLLeVHZN35jCtI4JdmLLbLiC1kBow==",
+            "dev": true,
+            "bin": {
+                "tsc": "bin/tsc",
+                "tsserver": "bin/tsserver"
+            },
+            "engines": {
+                "node": ">=4.2.0"
+            }
+        },
         "node_modules/webidl-conversions": {
             "version": "3.0.1",
             "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
@@ -1609,6 +1623,12 @@
             "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
             "integrity": "sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o="
         },
+        "typescript": {
+            "version": "4.1.6",
+            "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.1.6.tgz",
+            "integrity": "sha512-pxnwLxeb/Z5SP80JDRzVjh58KsM6jZHRAOtTpS7sXLS4ogXNKC9ANxHHZqLLeVHZN35jCtI4JdmLLbLiC1kBow==",
+            "dev": true
+        },
         "webidl-conversions": {
             "version": "3.0.1",
             "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
diff --git a/package.json b/package.json
index dbc600a..a147b41 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,8 @@
         "node": "^12.20.0 || >=14.13.1"
     },
     "devDependencies": {
-        "mocha": "^10.2.0"
+        "mocha": "^10.2.0",
+        "typescript": "4.1.x"
     },
     "scripts": {
         "test": "mocha"
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..1de11ca
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  // Change this to match your project
+  "include": ["index.js"],
+  "compilerOptions": {
+    // Tells TypeScript to read JS files, as
+    // normally they are ignored as source files
+    "allowJs": true,
+    // Generate d.ts files
+    "declaration": true,
+    // This compiler run should
+    // only output d.ts files
+    "emitDeclarationOnly": true,
+    "target": "ES6"
+  }
+}
\ No newline at end of file