diff --git a/Makefile b/Makefile
index 4d64e47..1345e56 100644
--- a/Makefile
+++ b/Makefile
@@ -67,7 +67,7 @@ dist/po.%.js: po/%.po $(NODE_MODULES_TEST)
 %.spec: %.spec.in
 	sed -e 's/%{VERSION}/$(VERSION)/g' $< > $@
 
-$(WEBPACK_TEST): $(NODE_MODULES_TEST) $(shell find src/ -type f) package.json webpack.config.js $(patsubst %,dist/po.%.js,$(LINGUAS))
+$(WEBPACK_TEST): $(LIB_TEST) $(NODE_MODULES_TEST) $(shell find src/ -type f) package.json webpack.config.js $(patsubst %,dist/po.%.js,$(LINGUAS))
 	NODE_ENV=$(NODE_ENV) npm run build
 
 watch:
diff --git a/package.json b/package.json
index 4c467b3..2ded3af 100644
--- a/package.json
+++ b/package.json
@@ -36,8 +36,8 @@
     "htmlparser": "^1.7.7",
     "jed": "^1.1.1",
     "mini-css-extract-plugin": "^0.9.0",
-    "node-sass": "^4.14.1",
     "po2json": "^1.0.0-alpha",
+    "sass": "^1.35.1",
     "sass-loader": "^7.0.3",
     "sizzle": "^2.3.3",
     "stdio": "^0.2.7",