diff --git a/package.json b/package.json
index 9971a1a7e1e..f0865960ca2 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "nslog": "^3",
     "oniguruma": "6.1.0",
     "pathwatcher": "6.8.0",
-    "postcss": "5.2.4",
+    "postcss": "8.0.0",
     "postcss-selector-parser": "2.2.1",
     "property-accessors": "^1.1.3",
     "random-words": "0.0.1",
@@ -80,7 +80,7 @@
     "typescript-simple": "1.0.0",
     "underscore-plus": "^1.6.6",
     "winreg": "^1.2.1",
-    "yargs": "^3.23.0"
+    "yargs": "^15.0.1"
   },
   "packageDependencies": {
     "atom-dark-syntax": "0.28.0",