diff --git a/ipyvuetify/Html.py b/ipyvuetify/Html.py
index f0975215..8c453268 100644
--- a/ipyvuetify/Html.py
+++ b/ipyvuetify/Html.py
@@ -2,7 +2,7 @@
 # added in the frontend.
 
 from ipyvue import Html as VueHtml
-from traitlets import Unicode
+from traitlets import Unicode, Dict
 
 from ._version import semver
 
@@ -21,5 +21,7 @@ class Html(VueHtml):
 
     _model_module_version = Unicode(semver).tag(sync=True)
 
+    _metadata = Dict(default_value=None, allow_none=True).tag(sync=True)
+
 
 __all__ = ["Html"]
diff --git a/ipyvuetify/VuetifyTemplate.py b/ipyvuetify/VuetifyTemplate.py
index a6ff04e9..b09b7e56 100644
--- a/ipyvuetify/VuetifyTemplate.py
+++ b/ipyvuetify/VuetifyTemplate.py
@@ -2,7 +2,7 @@
 # added in the frontend.
 
 from ipyvue import VueTemplate
-from traitlets import Unicode
+from traitlets import Unicode, Dict
 
 from ._version import semver
 
@@ -21,5 +21,7 @@ class VuetifyTemplate(VueTemplate):
 
     _model_module_version = Unicode(semver).tag(sync=True)
 
+    _metadata = Dict(default_value=None, allow_none=True).tag(sync=True)
+
 
 __all__ = ["VuetifyTemplate"]