diff --git a/package.json b/package.json
index 1419535..4564a24 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "homepage": "https://github.com/tap-format/failures#readme",
   "dependencies": {
     "chalk": "^1.1.1",
-    "diff": "^2.2.1",
+    "diff": "^4.0.1",
     "figures": "^1.4.0",
     "ramda": "^0.18.0",
     "rx": "^4.0.7"