diff --git a/src/Standart.Hash.xxHash/Utils.cs b/src/Standart.Hash.xxHash/Utils.cs
index ab3b49b..2e78c1f 100644
--- a/src/Standart.Hash.xxHash/Utils.cs
+++ b/src/Standart.Hash.xxHash/Utils.cs
@@ -208,8 +208,6 @@ namespace Standart.Hash.xxHash
                         *(long*)(ptrDst + 16) = *(long*)(ptrSrc + 16);
                         *(long*)(ptrDst + 24) = *(long*)(ptrSrc + 24);
                         return;
-                    default:
-                        break;
                 }
     
                 long* lpSrc = (long*)ptrSrc;
@@ -244,7 +242,7 @@ namespace Standart.Hash.xxHash
                 ptrSrc = (byte*)lpSrc;
                 ptrDst = (byte*)ldSrc;
                 goto SMALLTABLE;
-                }
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/Standart.Hash.xxHash/xxHash128.cs b/src/Standart.Hash.xxHash/xxHash128.cs
index 0215134..b072acb 100644
--- a/src/Standart.Hash.xxHash/xxHash128.cs
+++ b/src/Standart.Hash.xxHash/xxHash128.cs
@@ -35,7 +35,7 @@ namespace Standart.Hash.xxHash
         /// <param name="length">The length of the data for hashing</param>
         /// <param name="seed">The seed number</param>
         /// <returns>hash</returns>
-        public static unsafe uint128 ComputeHash(Span<byte> data, int length, uint seed = 0)
+        public static unsafe uint128 ComputeHash(Span<byte> data, int length, ulong seed = 0)
         {
             Debug.Assert(data != null);
             Debug.Assert(length >= 0);
@@ -54,7 +54,7 @@ namespace Standart.Hash.xxHash
         /// <param name="length">The length of the data for hashing</param>
         /// <param name="seed">The seed number</param>
         /// <returns>hash</returns>
-        public static unsafe uint128 ComputeHash(ReadOnlySpan<byte> data, int length, uint seed = 0)
+        public static unsafe uint128 ComputeHash(ReadOnlySpan<byte> data, int length, ulong seed = 0)
         {
             Debug.Assert(data != null);
             Debug.Assert(length >= 0);
@@ -67,12 +67,12 @@ namespace Standart.Hash.xxHash
         }
         
         /// <summary>
-        /// Compute xxHash for the data byte span 
+        /// Compute xxHash for the string 
         /// </summary>
         /// <param name="str">The source of data</param>
         /// <param name="seed">The seed number</param>
         /// <returns>hash</returns>
-        public static unsafe uint128 ComputeHash(string str, uint seed = 0)
+        public static unsafe uint128 ComputeHash(string str, ulong seed = 0)
         {
             Debug.Assert(str != null);