diff --git a/package.json b/package.json
index e519c2f..69f21f2 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "datauri": "^1.0.5",
     "eslint-config-xo-lukechilds": "^1.0.0",
     "nyc": "^11.0.2",
-    "pify": "^3.0.0",
+    "pify": "^4.0.0",
     "rollup": "^0.59.0",
     "rollup-plugin-buble": "^0.19.2",
     "xo": "^0.18.2"