diff --git a/csunplugged/package.json b/csunplugged/package.json
index da5e9332d..99b0176a3 100644
--- a/csunplugged/package.json
+++ b/csunplugged/package.json
@@ -11,7 +11,7 @@
         "browserify": "17.0.0",
         "child_process": "1.0.2",
         "codemirror": "5.65.6",
-        "cssnano": "5.1.15",
+        "cssnano": "6.0.2",
         "blockly": "7.20211209.2",
         "details-element-polyfill": "2.4.0",
         "fancy-log": "2.0.0",