diff --git a/src/documents/models.py b/src/documents/models.py
index 6e2a6ebcb..2b9871f59 100644
--- a/src/documents/models.py
+++ b/src/documents/models.py
@@ -112,7 +112,7 @@ class Tag(MatchingModel, TreeNodeModel):
         ),
     )
 
-    class Meta(MatchingModel.Meta):
+    class Meta(MatchingModel.Meta, TreeNodeModel.Meta):
         verbose_name = _("tag")
         verbose_name_plural = _("tags")
 
diff --git a/src/paperless/settings.py b/src/paperless/settings.py
index 37cf0ecfa..bd2e71dd5 100644
--- a/src/paperless/settings.py
+++ b/src/paperless/settings.py
@@ -334,6 +334,7 @@ INSTALLED_APPS = [
     "allauth.mfa",
     "drf_spectacular",
     "drf_spectacular_sidecar",
+    "treenode",
     *env_apps,
 ]