diff --git a/PhoenixCrypto/PhoenixCrypto/Classes/NativeWeakRandom.swift b/PhoenixCrypto/PhoenixCrypto/Classes/NativeWeakRandom.swift
index cfb4734ad..267998e57 100644
--- a/PhoenixCrypto/PhoenixCrypto/Classes/NativeWeakRandom.swift
+++ b/PhoenixCrypto/PhoenixCrypto/Classes/NativeWeakRandom.swift
@@ -14,12 +14,11 @@ public class NativeWeakRandom: NSObject {
     private class func toByteArr(i: UInt64) -> [UInt8] {
         let count = MemoryLayout<UInt64>.size
         var _i = i
-        let bytePtr = withUnsafePointer(to: &_i) {
-            $0.withMemoryRebound(to: UInt8.self, capacity: count) {
-                UnsafeBufferPointer(start: $0, count: count)
-            }
+        return withUnsafePointer(to: &_i) {
+          $0.withMemoryRebound(to: UInt8.self, capacity: count) {
+            [UInt8](UnsafeBufferPointer(start: $0, count: count))
+          }
         }
-        return [UInt8](bytePtr)
     }
 
 	@objc