diff --git a/app/database/events.py b/app/database/events.py
index 59515c8..19fe515 100644
--- a/app/database/events.py
+++ b/app/database/events.py
@@ -1,9 +1,9 @@
 from datetime import UTC, datetime
 from enum import Enum
-import json
 from typing import TYPE_CHECKING
 
 from sqlmodel import (
+    JSON,
     BigInteger,
     Column,
     DateTime,
@@ -40,7 +40,9 @@ class EventBase(SQLModel):
         sa_column=Column(DateTime(timezone=True), default=datetime.now(UTC))
     )
     type: EventType
-    event_payload: str
+    event_payload: dict = Field(
+        exclude=True, default_factory=dict, sa_column=Column(JSON)
+    )
 
 
 class Event(EventBase, table=True):
@@ -53,15 +55,9 @@ class Event(EventBase, table=True):
 
 
 class EventResp(EventBase):
-    _payload: dict
-
     def merge_payload(self) -> "EventResp":
-        parsed = {}
-        try:
-            parsed = json.loads(self.event_payload or "{}")
-        except json.JSONDecodeError:
-            parsed = {}
-        for key, value in parsed.items():
+        for key, value in self.event_payload.items():
             setattr(self, key, value)
-        self._payload = parsed
         return self
+
+    pass
diff --git a/migrations/versions/f785165a5c0b_convert_event_event_payload_from_str_to_.py b/migrations/versions/f785165a5c0b_convert_event_event_payload_from_str_to_.py
new file mode 100644
index 0000000..48827be
--- /dev/null
+++ b/migrations/versions/f785165a5c0b_convert_event_event_payload_from_str_to_.py
@@ -0,0 +1,137 @@
+"""convert Event.event_payload from str to json
+
+Revision ID: f785165a5c0b
+Revises: 881ac7ca01d5
+Create Date: 2025-08-13 06:02:11.911557
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = "f785165a5c0b"
+down_revision: str | Sequence[str] | None = "881ac7ca01d5"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column(
+        "beatmaps",
+        "mode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "best_scores",
+        "gamemode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "lazer_user_statistics",
+        "mode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "lazer_users",
+        "playmode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "monthly_playcounts", "count", existing_type=mysql.INTEGER(), nullable=False
+    )
+    op.alter_column(
+        "score_tokens",
+        "ruleset_id",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "scores",
+        "gamemode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "total_score_best_scores",
+        "gamemode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=False,
+    )
+    op.alter_column(
+        "user_events",
+        "event_payload",
+        existing_type=mysql.VARCHAR(length=255),
+        type_=sa.JSON(),
+        nullable=True,
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column(
+        "user_events",
+        "event_payload",
+        existing_type=sa.JSON(),
+        type_=mysql.VARCHAR(length=255),
+        nullable=False,
+    )
+    op.alter_column(
+        "total_score_best_scores",
+        "gamemode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    op.alter_column(
+        "scores",
+        "gamemode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    op.alter_column(
+        "score_tokens",
+        "ruleset_id",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    op.alter_column(
+        "monthly_playcounts", "count", existing_type=mysql.INTEGER(), nullable=True
+    )
+    op.alter_column(
+        "lazer_users",
+        "playmode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    op.alter_column(
+        "lazer_user_statistics",
+        "mode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    op.alter_column(
+        "best_scores",
+        "gamemode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    op.alter_column(
+        "beatmaps",
+        "mode",
+        existing_type=mysql.ENUM("OSU", "TAIKO", "FRUITS", "MANIA", "OSURX", "OSUAP"),
+        nullable=True,
+    )
+    # ### end Alembic commands ###