diff --git a/gulpfile.js b/gulpfile.js
index 3a59a79..28c7541 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -4,6 +4,7 @@ var pkg = require('./package.json'),
   autoprefixer = require('gulp-autoprefixer'),
   browserify = require('browserify'),
   buffer = require('vinyl-buffer'),
+  chmod = require('gulp-chmod'),
   connect = require('gulp-connect'),
   csso = require('gulp-csso'),
   del = require('del'),
@@ -48,6 +49,7 @@ gulp.task('html', gulp.series('clean:html', function _html() {
     .pipe(isDist ? through() : plumber())
     .pipe(pug({ pretty: '  ' }))
     .pipe(rename('index.html'))
+    .pipe(chmod(0o644))
     .pipe(gulp.dest('public'))
     .pipe(connect.reload());
 }));
diff --git a/package.json b/package.json
index 7ab3f80..6dac111 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "gh-pages": "~6.0",
     "gulp": "~4.0",
     "gulp-autoprefixer": "~8.0",
+    "gulp-chmod": "~3.1",
     "gulp-connect": "~5.7",
     "gulp-csso": "~4.0",
     "gulp-plumber": "~1.2",