diff --git a/week4/package-lock.json b/week4/package-lock.json
index e7e6f7b5..3d6c69d4 100644
--- a/week4/package-lock.json
+++ b/week4/package-lock.json
@@ -6191,9 +6191,9 @@
       "integrity": "sha1-AerA/jta9xoqbAL+q7jB/vfgDqs="
     },
     "postcss": {
-      "version": "7.0.27",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.27.tgz",
-      "integrity": "sha512-WuQETPMcW9Uf1/22HWUWP9lgsIC+KEHg2kozMflKjbeUtw9ujvFX6QmIfozaErDkmLWS9WEnEdEe6Uo9/BNTdQ==",
+      "version": "7.0.36",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz",
+      "integrity": "sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==",
       "requires": {
         "chalk": "^2.4.2",
         "source-map": "^0.6.1",