diff --git a/objects/domain-ip/definition.json b/objects/domain-ip/definition.json
index 3f3f6e6..6fc5ace 100644
--- a/objects/domain-ip/definition.json
+++ b/objects/domain-ip/definition.json
@@ -23,7 +23,7 @@
       "ui-priority": 0,
       "misp-attribute": "datetime"
     },
-    "registration_date": {
+    "registration-date": {
       "description": "Registration date of domain",
       "disable_correlation": false,
       "ui-priority": 0,