diff --git a/package.json b/package.json
index a5fbc2d..498b4ff 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   "dependencies": {
     "chalk": "^2.3.0",
     "clone": "^2.1.1",
-    "deepmerge": "^3.0.0",
+    "deepmerge": "^4.0.0",
     "fast-deep-equal": "^2.0.0",
     "get-stdin": "^6.0.0",
     "gh-got": "^8.0.0",