diff --git a/package.json b/package.json
index 907ef1b..1ef765b 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "babel-register": "^6.3.13",
     "budo": "^11.0.0",
     "cz-conventional-changelog": "2.1.0",
-    "expect": "^22.0.5",
+    "expect": "^23.0.1",
     "mocha": "^5.0.0",
     "to-vfile": "^2.0.0",
     "uglify-js": "^3.0.27"