diff --git a/package.json b/package.json
index d9b9163..da6a8c9 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "php-cs-fixer",
   "displayName": "php cs fixer",
   "description": "PHP CS Fixer extension for VS Code, php formatter, php code beautify tool, format html",
-  "version": "0.3.19",
+  "version": "0.3.20",
   "publisher": "junstyle",
   "author": "junstyle",
   "license": "ISC",
diff --git a/src/index.ts b/src/index.ts
index cbed213..fafcba1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -152,7 +152,11 @@ class PHPCSFixer extends PHPCSFixerConfig {
       }
     }
     if (!useConfig && this.rules) {
-      args.push('--rules="' + (this.rules as string).replace(/"/g, "\\\"") + '"')
+      if (process.platform == 'win32') {
+        args.push('--rules="' + (this.rules as string).replace(/"/g, "\\\"") + '"')
+      } else {
+        args.push('--rules=' + this.rules)
+      }
     }
     if (this.allowRisky) {
       args.push('--allow-risky=yes')
diff --git a/src/runAsync.ts b/src/runAsync.ts
index 960b42f..c18f280 100644
--- a/src/runAsync.ts
+++ b/src/runAsync.ts
@@ -2,11 +2,13 @@ import { spawn, SpawnOptionsWithoutStdio } from 'child_process';
 import { output } from './output';
 
 export function runAsync(command: string, args: string[], options: SpawnOptionsWithoutStdio, onData: (data: Buffer) => void = null) {
-  const cpOptions = Object.assign({}, options, { shell: true })
+  const cpOptions = Object.assign({}, options, { shell: process.platform == 'win32' })
   let cp;
   try {
-    if (command.includes(" ") && command[0] != '"') {
-      command = '"' + command + '"'
+    if (process.platform == 'win32') {
+      if (command.includes(" ") && command[0] != '"') {
+        command = '"' + command + '"'
+      }
     }
 
     output('runAsync: spawn ' + command);