diff --git a/pymisp/mispevent.py b/pymisp/mispevent.py
index e8c2d6c..db52ced 100644
--- a/pymisp/mispevent.py
+++ b/pymisp/mispevent.py
@@ -219,7 +219,7 @@ class MISPAttribute(object):
         if self.sharing_group_id:
             to_return['sharing_group_id'] = self.sharing_group_id
         if self.Tag:
-            to_return['Event']['Tag'] = self.Tag
+            to_return['Tag'] = self.Tag
         if self.data:
             to_return['data'] = base64.b64encode(self.data.getvalue()).decode()
             if self.encrypt: