diff --git a/02-preprocess/package-lock.json b/02-preprocess/package-lock.json
index b837919..7ab719a 100644
--- a/02-preprocess/package-lock.json
+++ b/02-preprocess/package-lock.json
@@ -399,9 +399,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "7.0.17",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.17.tgz",
-      "integrity": "sha512-546ZowA+KZ3OasvQZHsbuEpysvwTZNGJv9EfyCQdsIDltPSWHAeTQ5fQy/Npi2ZDtLI3zs7Ps/p6wThErhm9fQ==",
+      "version": "7.0.36",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz",
+      "integrity": "sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==",
       "dev": true,
       "requires": {
         "chalk": "^2.4.2",
diff --git a/02-preprocess/package.json b/02-preprocess/package.json
index 98b41ff..556b72e 100644
--- a/02-preprocess/package.json
+++ b/02-preprocess/package.json
@@ -16,7 +16,7 @@
     "autoprefixer": "^9.6.1",
     "endorphin": "^0.5.2",
     "mkdirp": "^0.5.1",
-    "postcss": "^7.0.17",
+    "postcss": "^7.0.36",
     "rollup": "^1.17.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-typescript2": "^0.22.0",