diff --git a/UI/WebServerResources/package.json b/UI/WebServerResources/package.json
index 31330f06f..885c8860c 100644
--- a/UI/WebServerResources/package.json
+++ b/UI/WebServerResources/package.json
@@ -17,7 +17,7 @@
     "ng-sortable": "1.3.7"
   },
   "devDependencies": {
-    "autoprefixer": ">=6.0.3",
+    "autoprefixer": "^9.7.3",
     "breakpoint-sass": ">=2.4.2",
     "csswring": ">=3.0.0",
     "grunt": ">=0.4.1",