diff --git a/shared/models/meet_kevin.py b/shared/models/meet_kevin.py
index cbbc646..28df77e 100644
--- a/shared/models/meet_kevin.py
+++ b/shared/models/meet_kevin.py
@@ -14,7 +14,7 @@ from sqlalchemy import (
     Numeric,
     String,
     Text,
-    Index,
+    func,
 )
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -166,7 +166,7 @@ class KevinTranscript(Base):
     segments_json: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
     word_count: Mapped[int] = mapped_column(Integer, nullable=False)
     created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), server_default="now()", nullable=False
+        DateTime(timezone=True), server_default=func.now(), nullable=False
     )
 
     # Relationships
@@ -196,7 +196,7 @@ class KevinAnalysis(Base):
     completion_tokens: Mapped[int] = mapped_column(Integer, nullable=False)
     cost_usd: Mapped[Decimal] = mapped_column(Numeric(10, 4), nullable=False)
     created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), server_default="now()", nullable=False
+        DateTime(timezone=True), server_default=func.now(), nullable=False
     )
 
     # Relationships
@@ -233,16 +233,9 @@ class KevinStockMention(Base):
         Integer, nullable=True
     )
     created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), server_default="now()", nullable=False
+        DateTime(timezone=True), server_default=func.now(), nullable=False
     )
 
     # Relationships
     video: Mapped[KevinVideo] = relationship(back_populates="mentions")
     analysis: Mapped[KevinAnalysis] = relationship(back_populates="mentions")
-
-
-# Create composite indexes as per spec
-__table_args__ = (
-    Index("ix_kevin_stock_mentions_symbol_created", "symbol", "created_at"),
-    Index("ix_kevin_videos_published", "published_at"),
-)