diff --git a/package.json b/package.json
index a7324c447..ea1cbcc0e 100644
--- a/package.json
+++ b/package.json
@@ -93,7 +93,7 @@
     "svgo": "^1.0.5",
     "systemjs-builder": "^0.16.0",
     "unexpected": "^12.0.0",
-    "unexpected-color": "^3.0.0",
+    "unexpected-color": "^4.0.0",
     "unexpected-dom": "^5.0.0",
     "unexpected-image": "^4.0.0",
     "unexpected-sinon": "^11.0.0",