diff --git a/api/api/db/alembic/versions/93106fbe7d83_.py b/api/api/db/alembic/versions/93106fbe7d83_.py
new file mode 100644
index 0000000..53d9604
--- /dev/null
+++ b/api/api/db/alembic/versions/93106fbe7d83_.py
@@ -0,0 +1,38 @@
+"""empty message
+
+Revision ID: 93106fbe7d83
+Revises: f1b06efacec0
+Create Date: 2025-06-26 16:36:02.270706
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = '93106fbe7d83'
+down_revision: Union[str, None] = 'f1b06efacec0'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('account_keyring', 'key_value',
+               existing_type=mysql.VARCHAR(length=255),
+               type_=sa.String(length=512),
+               existing_nullable=False)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('account_keyring', 'key_value',
+               existing_type=sa.String(length=512),
+               type_=mysql.VARCHAR(length=255),
+               existing_nullable=False)
+    # ### end Alembic commands ###
diff --git a/api/api/db/tables/account.py b/api/api/db/tables/account.py
index 84c689e..5325ddc 100644
--- a/api/api/db/tables/account.py
+++ b/api/api/db/tables/account.py
@@ -60,7 +60,7 @@ account_keyring_table = Table(
     Column("owner_id", UnsignedInt, ForeignKey("account.id"), primary_key=True, nullable=False),
     Column("key_type", SQLAEnum(KeyType), primary_key=True, nullable=False),
     Column("key_id", String(40), primary_key=True, default=None),
-    Column("key_value", String(255), nullable=False),
+    Column("key_value", String(512), nullable=False),
     Column("created_at", DateTime(timezone=True), server_default=func.now()),
     Column("expiry", DateTime(timezone=True), nullable=True),
     Column("status", SQLAEnum(KeyStatus), nullable=False),