diff --git a/package.json b/package.json
index 970a85a34..e1014eced 100644
--- a/package.json
+++ b/package.json
@@ -75,7 +75,7 @@
     "postcss": "^8.4.2",
     "postcss-calc": "^9.0.1",
     "postcss-custom-media": "^9.0.1",
-    "postcss-custom-properties": "12.1.11",
+    "postcss-custom-properties": "13.3.4",
     "postcss-import": "^15.0.1",
     "postcss-loader": "^7.0.2",
     "postcss-media-minmax": "^5.0.0",