diff --git a/app/models.py b/app/models.py
index 5c21ac72..fd8d94d3 100644
--- a/app/models.py
+++ b/app/models.py
@@ -232,7 +232,7 @@ class Fido(Base, ModelMixin):
         nullable=False,
     )
     public_key = sa.Column(sa.String(), nullable=False, unique=True)
-    sign_count = sa.Column(sa.Integer(), nullable=False)
+    sign_count = sa.Column(sa.BigInteger(), nullable=False)
     name = sa.Column(sa.String(128), nullable=False, unique=False)
 
 
diff --git a/migrations/versions/2021_110612_1076b5795b08_.py b/migrations/versions/2021_110612_1076b5795b08_.py
new file mode 100644
index 00000000..3ec8e828
--- /dev/null
+++ b/migrations/versions/2021_110612_1076b5795b08_.py
@@ -0,0 +1,26 @@
+"""empty message
+
+Revision ID: 1076b5795b08
+Revises: dd278f96ca83
+Create Date: 2021-11-06 12:36:11.352157
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '1076b5795b08'
+down_revision = 'dd278f96ca83'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # As alembic cannot detect changes in column type, do it manually
+    op.execute('ALTER TABLE fido ALTER COLUMN sign_count TYPE BIGINT;')
+
+
+def downgrade():
+    op.execute('ALTER TABLE fido ALTER COLUMN sign_count TYPE int;')