diff --git a/objects/domain-ip/definition.json b/objects/domain-ip/definition.json
index 7cd4d8a..3f3f6e6 100644
--- a/objects/domain-ip/definition.json
+++ b/objects/domain-ip/definition.json
@@ -23,6 +23,12 @@
       "ui-priority": 0,
       "misp-attribute": "datetime"
     },
+    "registration_date": {
+      "description": "Registration date of domain",
+      "disable_correlation": false,
+      "ui-priority": 0,
+      "misp-attribute": "datetime"
+    },
     "domain": {
       "description": "Domain name",
       "categories": [
@@ -43,7 +49,7 @@
       "multiple": true
     }
   },
-  "version": 5,
+  "version": 6,
   "description": "A domain and IP address seen as a tuple in a specific time frame.",
   "meta-category": "network",
   "uuid": "43b3b146-77eb-4931-b4cc-b66c60f28734",