diff --git a/package.json b/package.json
index bc7debdf..8b7816b3 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "file-exists": "^1.0.0",
     "glob": "^6.0.1",
     "gray-matter": "^2.0.1",
-    "gulp": "^3.9.0",
+    "gulp": "^4.0.0",
     "gulp-concat": "^2.6.0",
     "gulp-eslint": "^1.0.0",
     "gulp-if": "^2.0.0",
@@ -44,7 +44,7 @@
     "node-fetch": "^1.3.3",
     "oghliner": "^1.0.0",
     "postcss-cssnext": "^2.3.0",
-    "postcss-import": "^8.0.1",
+    "postcss-import": "^9.0.0",
     "postcss-nested": "^1.0.0",
     "postcss-simple-extend": "^1.0.0",
     "postcss-simple-vars": "^1.0.1",