diff --git a/src/sqlalchemy_cratedb/type/vector.py b/src/sqlalchemy_cratedb/type/vector.py
index 9cde7ea2..bca4dc85 100644
--- a/src/sqlalchemy_cratedb/type/vector.py
+++ b/src/sqlalchemy_cratedb/type/vector.py
@@ -44,7 +44,7 @@
 __all__ = ["FloatVector"]
 
 
-def from_db(value: t.Iterable) -> t.Optional[npt.ArrayLike]:
+def from_db(value: t.Iterable) -> t.Optional["npt.ArrayLike"]:
     import numpy as np
 
     # from `pgvector.utils`