diff --git a/build-scripts/gulp/compress.js b/build-scripts/gulp/compress.js
index de604f7fa3..aee165c5f7 100644
--- a/build-scripts/gulp/compress.js
+++ b/build-scripts/gulp/compress.js
@@ -9,25 +9,30 @@ const paths = require("../paths");
 gulp.task("compress-app", function compressApp() {
   const jsLatest = gulp
     .src(path.resolve(paths.output, "**/*.js"))
-    .pipe(zopfli())
+    .pipe(zopfli({ threshold: 150 }))
     .pipe(gulp.dest(paths.output));
 
   const jsEs5 = gulp
     .src(path.resolve(paths.output_es5, "**/*.js"))
-    .pipe(zopfli())
+    .pipe(zopfli({ threshold: 150 }))
     .pipe(gulp.dest(paths.output_es5));
 
   const polyfills = gulp
     .src(path.resolve(paths.static, "polyfills/*.js"))
-    .pipe(zopfli())
+    .pipe(zopfli({ threshold: 150 }))
     .pipe(gulp.dest(path.resolve(paths.static, "polyfills")));
 
   const translations = gulp
-    .src(path.resolve(paths.static, "translations/*.json"))
-    .pipe(zopfli())
+    .src(path.resolve(paths.static, "translations/**/*.json"))
+    .pipe(zopfli({ threshold: 150 }))
     .pipe(gulp.dest(path.resolve(paths.static, "translations")));
 
-  return merge(jsLatest, jsEs5, polyfills, translations);
+  const icons = gulp
+    .src(path.resolve(paths.static, "mdi/*.json"))
+    .pipe(zopfli({ threshold: 150 }))
+    .pipe(gulp.dest(path.resolve(paths.static, "mdi")));
+
+  return merge(jsLatest, jsEs5, polyfills, translations, icons);
 });
 
 gulp.task("compress-hassio", function compressApp() {