diff --git a/package.json b/package.json
index 46b0ea3..ace5d2a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@zxilly/bin-wrapper",
-	"version": "1.0.1",
+	"version": "1.0.2",
 	"description": "Binary wrapper that makes your programs seamlessly available as local dependencies, now with TypeScript.",
 	"license": "MIT",
 	"repository": "Zxilly/bin-wrapper-ts",
@@ -24,6 +24,8 @@
 		"types": "./lib/index.d.ts",
 		"default": "./lib/index.js"
 	},
+	"module": "lib/index.js",
+	"types": "lib/index.d.ts",
 	"keywords": [
 		"bin",
 		"check",
diff --git a/src/index.ts b/src/index.ts
index ff3e607..32cb6a9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,10 +5,11 @@ import {downloadAndExtract, download} from "./download";
 import {execa, ExecaChildProcess} from "execa";
 
 export type Arch = typeof process.arch
+export type Platform = typeof process.platform
 
 export interface SrcObject {
     url: string;
-    os: string;
+    os: Platform;
     arch: Arch;
 }
 
@@ -33,7 +34,7 @@ export default class BinWrapper {
      * @param os The OS to download for
      * @param arch The architecture to download for
      */
-    src(src: string, os: string, arch: Arch): this {
+    src(src: string, os: Platform, arch: Arch): this {
         this.sources.push({url: src, os, arch});
         return this;
     }
@@ -47,7 +48,7 @@ export default class BinWrapper {
      * @param prefix The files in the compressed archive met the prefix will be extracted
      * @param strip strip the directory levels from the extracted files
      */
-    compressedSrc(src: string, os: string, arch: Arch, prefix: string, strip: number): this {
+    compressedSrc(src: string, os: Platform, arch: Arch, prefix: string, strip: number): this {
         this.sources.push({url: src, os, arch, prefix, strip});
         return this;
     }