diff --git a/build/javascript/package-lock.json b/build/javascript/package-lock.json
index a40d72c7b..f7c168df8 100644
--- a/build/javascript/package-lock.json
+++ b/build/javascript/package-lock.json
@@ -1415,9 +1415,9 @@
       }
     },
     "postcss": {
-      "version": "8.3.3",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.3.tgz",
-      "integrity": "sha512-gnXd9C4bGKevvlNFd80I8WfxHX+g6MR+W2h19PlDNHUuT9248rHTvCIDeZI3Hvs5mB3gzXiNDwVK3S153WJbZA==",
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.4.tgz",
+      "integrity": "sha512-/tZY0PXExXXnNhKv3TOvZAOUYRyuqcCbBm2c17YMDK0PlVII3K7/LKdt3ScHL+hhouddjUWi+1sKDf9xXW+8YA==",
       "dev": true,
       "requires": {
         "colorette": "^1.2.2",
diff --git a/build/javascript/package.json b/build/javascript/package.json
index 0afa22a38..3744b116e 100644
--- a/build/javascript/package.json
+++ b/build/javascript/package.json
@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "cssnano": "^5.0.6",
-    "postcss": "^8.3.3",
+    "postcss": "^8.3.4",
     "postcss-cli": "^8.3.1"
   },
   "snowpack": {