diff --git a/UI/WebServerResources/package.json b/UI/WebServerResources/package.json
index f3ffbc75d..72b6d5758 100644
--- a/UI/WebServerResources/package.json
+++ b/UI/WebServerResources/package.json
@@ -21,7 +21,7 @@
     "autoprefixer": "^9.8.5",
     "breakpoint-sass": ">=2.4.2",
     "grunt": "^1.3.0",
-    "grunt-contrib-cssmin": ">=1.0.0",
+    "grunt-contrib-cssmin": "^4.0.0",
     "grunt-contrib-jshint": "^3.0.0",
     "grunt-contrib-uglify": "^5.0.0",
     "grunt-contrib-watch": ">=0.5.3",