diff --git a/ui/webui/package.json b/ui/webui/package.json
index fd6564f7e2f..8f8fa9c450f 100644
--- a/ui/webui/package.json
+++ b/ui/webui/package.json
@@ -36,7 +36,7 @@
     "eslint-webpack-plugin": "^2.5.3",
     "htmlparser": "^1.7.7",
     "jed": "^1.1.1",
-    "mini-css-extract-plugin": "^2.4.5",
+    "mini-css-extract-plugin": "~2.4.5",
     "po2json": "^1.0.0-alpha",
     "qunit": "^2.9.3",
     "sass": "^1.35.2",