diff --git a/package.json b/package.json
index 1e43bdf..0840fd0 100644
--- a/package.json
+++ b/package.json
@@ -30,17 +30,17 @@
 		"postcss-runner"
 	],
 	"dependencies": {
-		"autoprefixer": "^8.0.0",
+		"autoprefixer": "^9.1.3",
 		"fancy-log": "^1.3.2",
 		"plugin-error": "^1.0.1",
-		"postcss": "^6.0.1",
+		"postcss": "^7.0.2",
 		"through2": "^2.0.0",
 		"vinyl-sourcemaps-apply": "^0.2.0"
 	},
 	"devDependencies": {
 		"ava": "*",
 		"gulp-sourcemaps": "^2.6.0",
-		"p-event": "^1.1.0",
+		"p-event": "^2.1.0",
 		"vinyl": "^2.1.0",
 		"xo": "*"
 	}