diff --git a/package-lock.json b/package-lock.json
index cf2b0687..dfdbcbac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1084,9 +1084,9 @@
       "integrity": "sha1-g4NCMMyfdMRX3lnuvRVD/uuDt+w="
     },
     "css-what": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/css-what/-/css-what-3.2.1.tgz",
-      "integrity": "sha512-WwOrosiQTvyms+Ti5ZC5vGEK0Vod3FTt1ca+payZqvKuGJF+dq7bG63DstxtN0dpm6FxY27a/zS3Wten+gEtGw=="
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-5.0.1.tgz",
+      "integrity": "sha512-FYDTSHb/7KXsWICVsxdmiExPjCfRC4qRFBdVwv7Ax9hMnvMmEjP9RfxTEZ3qPZGmADDn2vAKSo9UcN1jKVYscg=="
     },
     "cssesc": {
       "version": "2.0.0",
diff --git a/package.json b/package.json
index c8b8a247..ddf000ff 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "axios": "^0.19.0",
     "cheerio": "^1.0.0-rc.2",
     "cross-env": "^6.0.3",
-    "css-what": "^3.2.1",
+    "css-what": "^5.0.1",
     "cssnano": "^4.1.10",
     "cssom": "^0.4.4",
     "date-fns": "^2.6.0",