diff --git a/paperone/models.py b/paperone/models.py
index aa19aae..f3e8aa8 100644
--- a/paperone/models.py
+++ b/paperone/models.py
@@ -1,4 +1,4 @@
-from sqlmodel import SQLModel, Field, Relationship
+from sqlmodel import SQLModel, Field, Relationship, ForeignKeyConstraint
 from datetime import datetime
 from typing import Optional
 
@@ -17,18 +17,18 @@ class TickerOHLCV(SQLModel, table=True):
 
     indicators: Optional["IndicatorsData"] = Relationship(
         back_populates="ohlcv",
-        sa_relationship_kwargs={
-            "foreign_keys": "[IndicatorsData.ticker, IndicatorsData.date]",
-            "uselist": False,
-        },
+        sa_relationship_kwargs={"uselist": False},
     )
 
 
 class IndicatorsData(SQLModel, table=True):
     __tablename__ = "indicators"
+    __table_args__ = (
+        ForeignKeyConstraint(["ticker", "date"], ["ohlcv.ticker", "ohlcv.date"]),
+    )
 
-    ticker: str = Field(foreign_key="ohlcv.ticker", primary_key=True)
-    date: datetime = Field(foreign_key="ohlcv.date", primary_key=True, index=True)
+    ticker: str = Field(primary_key=True)
+    date: datetime = Field(primary_key=True, index=True)
 
     # ========================================================================
     # MOMENTUM INDICATORS (Trend Direction & Strength)