diff --git a/flytekit/types/schema/types.py b/flytekit/types/schema/types.py
index 349b5aaf5a..75a54292c5 100644
--- a/flytekit/types/schema/types.py
+++ b/flytekit/types/schema/types.py
@@ -334,7 +334,7 @@ class FlyteSchemaTransformer(TypeTransformer[FlyteSchema]):
         datetime.datetime: SchemaType.SchemaColumn.SchemaColumnType.DATETIME,
         _np.timedelta64: SchemaType.SchemaColumn.SchemaColumnType.DURATION,
         datetime.timedelta: SchemaType.SchemaColumn.SchemaColumnType.DURATION,
-        _np.string_: SchemaType.SchemaColumn.SchemaColumnType.STRING,
+        _np.bytes_: SchemaType.SchemaColumn.SchemaColumnType.STRING,
         _np.str_: SchemaType.SchemaColumn.SchemaColumnType.STRING,
         _np.object_: SchemaType.SchemaColumn.SchemaColumnType.STRING,
         str: SchemaType.SchemaColumn.SchemaColumnType.STRING,
diff --git a/flytekit/types/structured/structured_dataset.py b/flytekit/types/structured/structured_dataset.py
index 1d2209a2b4..18e9eeb09a 100644
--- a/flytekit/types/structured/structured_dataset.py
+++ b/flytekit/types/structured/structured_dataset.py
@@ -340,7 +340,7 @@ def get_supported_types():
         _datetime.datetime: type_models.LiteralType(simple=type_models.SimpleType.DATETIME),
         _np.timedelta64: type_models.LiteralType(simple=type_models.SimpleType.DURATION),
         _datetime.timedelta: type_models.LiteralType(simple=type_models.SimpleType.DURATION),
-        _np.string_: type_models.LiteralType(simple=type_models.SimpleType.STRING),
+        _np.bytes_: type_models.LiteralType(simple=type_models.SimpleType.STRING),
         _np.str_: type_models.LiteralType(simple=type_models.SimpleType.STRING),
         _np.object_: type_models.LiteralType(simple=type_models.SimpleType.STRING),
         str: type_models.LiteralType(simple=type_models.SimpleType.STRING),
diff --git a/pyproject.toml b/pyproject.toml
index 5aece34595..74a41ae422 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ dependencies = [
     "marshmallow-enum",
     "marshmallow-jsonschema>=0.12.0",
     "mashumaro>=3.11",
+    "numpy<2",
     "protobuf!=4.25.0",
     "pyarrow",
     "pygments",