diff --git a/Milvus.Client/FieldSchema.cs b/Milvus.Client/FieldSchema.cs
index 4efd6d2..0c9720b 100644
--- a/Milvus.Client/FieldSchema.cs
+++ b/Milvus.Client/FieldSchema.cs
@@ -76,7 +76,7 @@ public static FieldSchema CreateVarchar(
     /// <param name="name">The field name.</param>
     /// <param name="dimension">The dimension of the vector. Must be greater than zero.</param>
     /// <param name="description">An optional description for the field.</param>
-    public static FieldSchema CreateFloatVector(string name, long dimension, string description = "")
+    public static FieldSchema CreateFloatVector(string name, int dimension, string description = "")
         => new(name, MilvusDataType.FloatVector, description: description) { Dimension = dimension };
 
     /// <summary>
@@ -85,7 +85,7 @@ public static FieldSchema CreateFloatVector(string name, long dimension, string
     /// <param name="name">The field name.</param>
     /// <param name="dimension">The dimension of the vector. Must be greater than zero.</param>
     /// <param name="description">An optional description for the field.</param>
-    public static FieldSchema CreateBinaryVector(string name, long dimension, string description = "")
+    public static FieldSchema CreateBinaryVector(string name, int dimension, string description = "")
         => new(name, MilvusDataType.BinaryVector, description: description) { Dimension = dimension };
 
     /// <summary>
@@ -191,7 +191,7 @@ internal FieldSchema(
     /// The dimension of the vector. Mandatory for <see cref="MilvusDataType.FloatVector" />
     /// and <see cref="MilvusDataType.BinaryVector" /> fields, and must be greater than zero.
     /// </summary>
-    public long? Dimension { get; set; }
+    public int? Dimension { get; set; }
 
     /// <summary>
     /// The state of the field.
diff --git a/Milvus.Client/MilvusCollection.Collection.cs b/Milvus.Client/MilvusCollection.Collection.cs
index 2ca2a12..057aba7 100644
--- a/Milvus.Client/MilvusCollection.Collection.cs
+++ b/Milvus.Client/MilvusCollection.Collection.cs
@@ -46,7 +46,7 @@ await _client.InvokeAsync(_client.GrpcClient.DescribeCollectionAsync, request, r
                         break;
 
                     case Constants.VectorDim:
-                        milvusField.Dimension = long.Parse(parameter.Value, CultureInfo.InvariantCulture);
+                        milvusField.Dimension = int.Parse(parameter.Value, CultureInfo.InvariantCulture);
                         break;
                 }
             }