diff --git a/_src/_assets/images/photo2.jpg b/_src/_assets/images/photo2.jpg
deleted file mode 100644
index c59a5da..0000000
Binary files a/_src/_assets/images/photo2.jpg and /dev/null differ
diff --git a/_src/_assets/images/share-image.png b/_src/_assets/images/share-image.png
index fbfbcc2..838f298 100644
Binary files a/_src/_assets/images/share-image.png and b/_src/_assets/images/share-image.png differ
diff --git a/_src/_assets/images/share-image@2x.png b/_src/_assets/images/share-image@2x.png
deleted file mode 100644
index bfb20f7..0000000
Binary files a/_src/_assets/images/share-image@2x.png and /dev/null differ
diff --git a/gulpfile.js b/gulpfile.js
index 315647d..737ad2b 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -193,7 +193,7 @@ gulp.task('svg', function() {
 gulp.task('images', function() {
     return gulp.src(SRC + '_assets/images/**/*')
         .pipe($.if(isProduction, $.imagemin({
-            optimizationLevel: 5, // png
+            optimizationLevel: 3, // png
             progressive: true, // jpg
             interlaced: true, // gif
             multipass: true, // svg