diff --git a/maubot/db.py b/maubot/db.py
index 2373fb2..709795d 100644
--- a/maubot/db.py
+++ b/maubot/db.py
@@ -46,7 +46,7 @@ class DBClient(Base):
 
     id: UserID = Column(String(255), primary_key=True)
     homeserver: str = Column(String(255), nullable=False)
-    access_token: str = Column(String(255), nullable=False)
+    access_token: str = Column(Text, nullable=False)
     enabled: bool = Column(Boolean, nullable=False, default=False)
 
     next_batch: SyncToken = Column(String(255), nullable=False, default="")