diff --git a/Sources/XXClient/Models/GroupMember.swift b/Sources/XXClient/Models/GroupMember.swift
index b08d71c250c9af5d4c6ca504dda9fc8586117eb5..8ce7120a58880ab94f9f8a590ad6872565684bfd 100644
--- a/Sources/XXClient/Models/GroupMember.swift
+++ b/Sources/XXClient/Models/GroupMember.swift
@@ -1,30 +1,27 @@
 import Foundation
 
 public struct GroupMember: Equatable {
-  public init(id: Data, dhKey: DHKey) {
+  public init(id: Data) {
     self.id = id
-    self.dhKey = dhKey
   }
 
   public var id: Data
-  public var dhKey: DHKey
 }
 
 extension GroupMember: Decodable {
   enum CodingKeys: String, CodingKey {
     case id = "ID"
-    case dhKey = "DhKey"
   }
 
   public static func decode(_ data: Data) throws -> Self {
-    let data = convertJsonNumberToString(in: data, at: "Value")
+    let data = convertJsonNumberToString(in: data, minNumberLength: 19)
     return try JSONDecoder().decode(Self.self, from: data)
   }
 }
 
 extension Array where Element == GroupMember {
   public static func decode(_ data: Data) throws -> Self {
-    let data = convertJsonNumberToString(in: data, at: "Value")
+    let data = convertJsonNumberToString(in: data, minNumberLength: 19)
     return try JSONDecoder().decode(Self.self, from: data)
   }
 }
diff --git a/Tests/XXClientTests/Models/GroupMemberTests.swift b/Tests/XXClientTests/Models/GroupMemberTests.swift
index a682dfe97ca7c707845c678dca6cba006e4adf5a..36e178c08f37b0bec719f4c3b7747043a9920491 100644
--- a/Tests/XXClientTests/Models/GroupMemberTests.swift
+++ b/Tests/XXClientTests/Models/GroupMemberTests.swift
@@ -5,14 +5,12 @@ import XCTest
 final class GroupMemberTests: XCTestCase {
   func testCoding() throws {
     let idB64 = "U4x/lrFkvxuXu59LtHLon1sUhPJSCcnZND6SugndnVID"
-    let dhKeyValue = "1759426033802606996617132861414734059978289057332806031357800676138355264622676606691435603603751978195460163638145821347601916259127578968570412642641025630452893097179266022832268525346700655861033031712000288680395716922501450233258587788020541937373196899001184700899008948530359980753630443486308876999029238453979779103124291315202352475056237021681172884599194016245219278368648568458514708567045834427853469072638665888791358582182353417065794210125797368093469194927663862565508608719835557592421245749381164023134450699040591219966988201315627676532245052123725278573237006510683695959381015415110970848376498637637944431576313526294020390694483472829278364602405292767170719547347485307956614210210673321959886410245334772057212077704024337636501108566655549055129066343309591274727538343075929837698653965640646190405582788894021694347212874155979958144038307500444865955516612526623220973497735316081265793063949"
-    let dhKeyFingerprint: UInt64 = 15989433043166758754
     let jsonString = """
     {
       "ID": "\(idB64)",
       "DhKey": {
-        "Value": \(dhKeyValue),
-        "Fingerprint": \(dhKeyFingerprint)
+        "Value": 1759426033802606996617132861414734059978289057332806031357800676138355264622676606691435603603751978195460163638145821347601916259127578968570412642641025630452893097179266022832268525346700655861033031712000288680395716922501450233258587788020541937373196899001184700899008948530359980753630443486308876999029238453979779103124291315202352475056237021681172884599194016245219278368648568458514708567045834427853469072638665888791358582182353417065794210125797368093469194927663862565508608719835557592421245749381164023134450699040591219966988201315627676532245052123725278573237006510683695959381015415110970848376498637637944431576313526294020390694483472829278364602405292767170719547347485307956614210210673321959886410245334772057212077704024337636501108566655549055129066343309591274727538343075929837698653965640646190405582788894021694347212874155979958144038307500444865955516612526623220973497735316081265793063949,
+        "Fingerprint": 15989433043166758754
       }
     }
     """
@@ -20,11 +18,7 @@ final class GroupMemberTests: XCTestCase {
     let model = try GroupMember.decode(jsonData)
 
     XCTAssertNoDifference(model, GroupMember(
-      id: Data(base64Encoded: idB64)!,
-      dhKey: DHKey(
-        value: dhKeyValue,
-        fingerprint: dhKeyFingerprint
-      )
+      id: Data(base64Encoded: idB64)!
     ))
 
     let jsonArrayString = "[\(jsonString)]"