diff --git a/frontend-js/package.json b/frontend-js/package.json
index 641da402ddcf5c5255ab0b62528dd34f7505c304..20e07bc3e4eae1e6b17b3059a293513ac3ac6001 100644
--- a/frontend-js/package.json
+++ b/frontend-js/package.json
@@ -4,7 +4,7 @@
   "description": "frontentd for minerva google maps interface",
   "main": "minerva.js",
   "scripts": {
-    "build:css": "cleancss -o dist/minerva.css node_modules/dual-listbox/dist/*.css src/main/css/*.css",
+    "build:css": "cleancss --skip-rebase -o dist/minerva.css node_modules/dual-listbox/dist/*.css src/main/css/*.css",
     "build:js": "browserify --debug --standalone minerva src/main/js/minerva.js | exorcist dist/minerva.js.map > dist/minerva.js ",
     "//": "rm -rf dist & rmdir /q /s dist & mkdir dist & browserify --debug --standalone minerva src/main/js/minerva.js | exorcist dist/minerva.js.map > dist/minerva.js & uglifyjs --compress --mangle --in-source-map dist/minerva.js.map --source-map-include-sources --source-map dist/minerva.min.js.map -o dist/minerva.min.js dist/minerva.js",
     "build-deploy": "npm run build && npm run deploy",