diff --git a/gulpfile.js b/gulpfile.js
index a402b89..18c5736 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -15,7 +15,7 @@ gulp.task('lint:sass', () => {
   const options = {
     reporters: [{formatter: 'string', console: true}]
   }
-  return gulp.src('sass/**/*.sass')
+  return gulp.src('sass/**/*.s*')
     .pipe(stylelint(options))
 })
 
@@ -27,7 +27,7 @@ gulp.task('build:dev', () => {
     indent: '  ',
     autosemicolon: true
   }
-  return gulp.src('sass/**/*.sass')
+  return gulp.src('sass/**/*.s*')
     .pipe(sass(options).on('error', sass.logError))
     .pipe(beautify(bOptions))
     .pipe(gulp.dest('temp'))
@@ -41,7 +41,7 @@ gulp.task('build:prod', () => {
     indent: '  ',
     autosemicolon: true
   }
-  return gulp.src('sass/**/*.sass')
+  return gulp.src('sass/**/*.s*')
     .pipe(sass(options).on('error', sass.logError))
     .pipe(beautify(bOptions))
     .pipe(gulp.dest('css'))
@@ -109,5 +109,5 @@ gulp.task('generate', ['lint:js', 'lint:sass', 'build:dev', 'build:prod'], () =>
 })
 
 gulp.task('watch', () => {
-  gulp.watch('sass/**/*.sass', ['lint:js', 'lint:sass', 'build:dev'])
+  gulp.watch('sass/**/*.s*', ['lint:js', 'lint:sass', 'build:dev'])
 })