diff --git a/Readme.md b/Readme.md
index c246669..70bb23b 100644
--- a/Readme.md
+++ b/Readme.md
@@ -20,7 +20,7 @@
 ```
 "start": "node --experimental-modules --experimental-wasm-modules ./dist/index.js",
 "build": "npm run asbuild && tsc -p ./tsconfig.json && npm run copy",
-"copy": "rm -rf dist/build/ && cp -r build dist/build/",
+"copy": "shx rm -rf dist/build/ && shx cp -r build dist/build/",,
 ```
 7. Rename index.js to loader.ts, add any missing types and export the webassembly instance to be used from other files
 
@@ -32,4 +32,4 @@
 ## To read
 https://docs.assemblyscript.org/quick-start
 
-https://www.joyent.com/blog/improved-wasm-support-coming-to-node
\ No newline at end of file
+https://www.joyent.com/blog/improved-wasm-support-coming-to-node
diff --git a/package.json b/package.json
index d24bb0a..d9f56cb 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "start": "node --experimental-modules --experimental-wasm-modules ./dist/index.js",
     "build": "npm run asbuild && tsc -p ./tsconfig.json && npm run copy",
-    "copy": "rm -rf dist/build/ && cp -r build dist/build/",
+    "copy": "shx rm -rf dist/build/ && shx cp -r build dist/build/",
     "test": "echo \"Error: no test specified\" && exit 1",
     "asbuild:untouched": "asc assembly/index.ts -b build/untouched.wasm -t build/untouched.wat --sourceMap --validate --debug",
     "asbuild:optimized": "asc assembly/index.ts -b build/optimized.wasm -t build/optimized.wat --sourceMap --validate --optimize",
@@ -15,10 +15,11 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "typescript": "^3.7.2"
+    "typescript": "^3.8.3"
   },
   "devDependencies": {
-    "@types/node": "^12.12.14",
-    "assemblyscript": "^0.8.1"
+    "@types/node": "^12.12.31",
+    "assemblyscript": "^0.9.4",
+    "shx": "^0.3.2"
   }
 }