diff --git a/examples/hello_milvus.py b/examples/hello_milvus.py
index 0cbb8f944..fcb475db7 100644
--- a/examples/hello_milvus.py
+++ b/examples/hello_milvus.py
@@ -73,7 +73,7 @@
     # provide the pk field because `auto_id` is set to False
     [str(i) for i in range(num_entities)],
     rng.random(num_entities).tolist(),  # field random, only supports list
-    rng.random((num_entities, dim)),    # field embeddings, supports numpy.ndarray and list
+    rng.random((num_entities, dim), np.float32),    # field embeddings, supports numpy.ndarray and list
 ]
 
 insert_result = hello_milvus.insert(entities)
diff --git a/pymilvus/orm/prepare.py b/pymilvus/orm/prepare.py
index 5e2902a20..799fcad04 100644
--- a/pymilvus/orm/prepare.py
+++ b/pymilvus/orm/prepare.py
@@ -91,7 +91,7 @@ def prepare_insert_data(
                                 field.name, "np.float32/np.float64", f_data.dtype
                             )
                         )
-                    d = f_data.view(np.float32).tolist()
+                    d = f_data.tolist()
 
                 elif isinstance(f_data[0], np.ndarray):
                     for ndarr in f_data: