diff --git a/package.json b/package.json
index 18b4a12b..a6ebde6c 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
         "markdown-translator": "^0.4.5",
         "mathjax": "^3.2.2",
         "node-cmd": "^5.0.0",
-        "postcss": "^8.4.25",
+        "postcss": "^8.4.31",
         "postcss-css-variables": "^0.19.0",
         "resolve-url-loader": "^5.0.0",
         "responsive-loader": "^3.1.2",
diff --git a/yarn.lock b/yarn.lock
index ffcade0b..de741114 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6237,10 +6237,10 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.1.0, postcss-value-parser@^
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz#723c09920836ba6d3e5af019f92bc0971c02e514"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@^8.1.10, postcss@^8.2.1, postcss@^8.2.14, postcss@^8.2.15, postcss@^8.4.23, postcss@^8.4.25:
-  version "8.4.25"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.25.tgz#4a133f5e379eda7f61e906c3b1aaa9b81292726f"
-  integrity sha512-7taJ/8t2av0Z+sQEvNzCkpDynl0tX3uJMCODi6nT3PfASC7dYCWV9aQ+uiCf+KBD4SEFcu+GvJdGdwzQ6OSjCw==
+postcss@^8.1.10, postcss@^8.2.1, postcss@^8.2.14, postcss@^8.2.15, postcss@^8.4.23, postcss@^8.4.31:
+  version "8.4.31"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.31.tgz#92b451050a9f914da6755af352bdc0192508656d"
+  integrity sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==
   dependencies:
     nanoid "^3.3.6"
     picocolors "^1.0.0"