diff --git a/package.json b/package.json
index 68aa8ea..9c37477 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "build:js": "esbuild static/src/js/*.js --bundle --outdir=static/build/js --minify --sourcemap",
-    "build:css": "sass --style=compressed --load-path=$PWD/node_modules static/src/scss:static/build/css",
+    "build:css": "sass --style=compressed --embed-sources --load-path=$PWD/node_modules static/src/scss:static/build/css",
     "build:contrib": "./scripts/copy-npm-contrib.sh",
     "build": "npm-run-all build:*",
     "lint:eslint": "eslint --ext js --report-unused-disable-directives .",