diff --git a/bootstrap/bootstrap.js b/bootstrap/bootstrap.js
index 95372ca..9b9bfe0 100644
--- a/bootstrap/bootstrap.js
+++ b/bootstrap/bootstrap.js
@@ -9,4 +9,8 @@ for (const dir of dirs) {
   if (!fs.existsSync(dir_path)) {
     fs.mkdirSync(dir_path);
   }
+}
+
+if (process.platform !== 'win32'){
+  fs.chmodSync(`${root_path}/src/bin/oxipng`, "755")
 }
\ No newline at end of file