diff --git a/package.json b/package.json
index 243eee1..544ce4f 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,8 @@
   "homepage": "https://github.com/flynx/object-diff.js#readme",
   "dependencies": {
     "generic-walk": "^1.4.0",
-    "ig-object": "^2.2.0"
+    "ig-object": "^2.2.0",
+    "ig-types": "^6.1.0"
   },
   "devDependencies": {
     "ig-test": "*"