diff --git a/h/migrations/versions/550865ed6622_update_mention_to_reference_annotation.py b/h/migrations/versions/550865ed6622_update_mention_to_reference_annotation.py
new file mode 100644
index 00000000000..f4ceac4471e
--- /dev/null
+++ b/h/migrations/versions/550865ed6622_update_mention_to_reference_annotation.py
@@ -0,0 +1,39 @@
+"""Update mention to reference annotation.
+
+Revision ID: 550865ed6622
+Revises: 39cc1025a3a2
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+from h.db import types
+
+revision = "550865ed6622"
+down_revision = "39cc1025a3a2"
+
+
+def upgrade() -> None:
+    op.drop_column("mention", "annotation_id")
+    op.add_column(
+        "mention",
+        sa.Column(
+            "annotation_id",
+            types.URLSafeUUID(),
+            sa.ForeignKey("annotation.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("mention", "annotation_id")
+    op.add_column(
+        "mention",
+        sa.Column(
+            "annotation_id",
+            sa.INTEGER(),
+            sa.ForeignKey("annotation_slim.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+    )
diff --git a/h/models/annotation.py b/h/models/annotation.py
index 7254a4630f4..f6611edd01e 100644
--- a/h/models/annotation.py
+++ b/h/models/annotation.py
@@ -138,6 +138,8 @@ class Annotation(Base):
         uselist=True,
     )
 
+    mentions = sa.orm.relationship("Mention", back_populates="annotation")
+
     @property
     def uuid(self):
         """
diff --git a/h/models/mention.py b/h/models/mention.py
index 04afb6bfab6..be52ba700ad 100644
--- a/h/models/mention.py
+++ b/h/models/mention.py
@@ -1,7 +1,7 @@
 import sqlalchemy as sa
 from sqlalchemy.orm import Mapped, mapped_column
 
-from h.db import Base
+from h.db import Base, types
 from h.db.mixins import Timestamps
 from h.models import helpers
 
@@ -11,13 +11,13 @@ class Mention(Base, Timestamps):  # pragma: nocover
 
     id: Mapped[int] = mapped_column(sa.Integer, autoincrement=True, primary_key=True)
 
-    annotation_id: Mapped[int] = mapped_column(
-        sa.Integer,
-        sa.ForeignKey("annotation_slim.id", ondelete="CASCADE"),
+    annotation_id: Mapped[types.URLSafeUUID] = mapped_column(
+        types.URLSafeUUID,
+        sa.ForeignKey("annotation.id", ondelete="CASCADE"),
         nullable=False,
     )
-    """FK to annotation_slim.id"""
-    annotation = sa.orm.relationship("AnnotationSlim")
+    """FK to annotation.id"""
+    annotation = sa.orm.relationship("Annotation", back_populates="mentions")
 
     user_id: Mapped[int] = mapped_column(
         sa.Integer,