diff --git a/WotBlitzStatisticsPro.Common/Model/WargamingProlongInfo.cs b/WotBlitzStatisticsPro.Common/Model/WargamingProlongInfo.cs
new file mode 100644
index 0000000..5c9c5ad
--- /dev/null
+++ b/WotBlitzStatisticsPro.Common/Model/WargamingProlongInfo.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// Prolong Wargaming Auth token response
+    /// </summary>
+    public class WargamingProlongInfo
+    {
+        /// <summary>
+        /// Player Account Id
+        /// </summary>
+        public long AccountId { get; set; }
+
+        /// <summary>
+        /// New access token
+        /// </summary>
+        public string AccessToken { get; set; } = string.Empty;
+
+        /// <summary>
+        /// New expiration unix timestamp
+        /// </summary>
+        public int ExpirationTimeStamp { get; set; }
+    }
+}
diff --git a/WotBlitzStatisticsPro.GraphQl/Mutation/WargamingAuthMutation.cs b/WotBlitzStatisticsPro.GraphQl/Mutation/WargamingAuthMutation.cs
new file mode 100644
index 0000000..08ed2ed
--- /dev/null
+++ b/WotBlitzStatisticsPro.GraphQl/Mutation/WargamingAuthMutation.cs
@@ -0,0 +1,29 @@
+using HotChocolate.Types;
+using System.Threading.Tasks;
+using WotBlitzStatisticsPro.Common.Model;
+using WotBlitzStatisticsPro.WgApiClient;
+
+namespace WotBlitzStatisticsPro.GraphQl.Mutation
+{
+    [ExtendObjectType(Name = "Mutation")]
+    public class WargamingAuthMutation
+    {
+        private readonly IWargamingAuthenticationClient _wargamingAuthenticationClient;
+
+        public WargamingAuthMutation(IWargamingAuthenticationClient wargamingAuthenticationClient)
+        {
+            _wargamingAuthenticationClient = wargamingAuthenticationClient;
+        }
+
+        /// <summary>
+        /// Prolongates Wargaming authentication token
+        /// </summary>
+        /// <param name="realm">Wargaming realm</param>
+        /// <param name="oldToken">Old token to prolongate</param>
+        /// <returns></returns>
+        public Task<WargamingProlongInfo> ProlongAuthToken(RealmType realm, string oldToken)
+        {
+            return _wargamingAuthenticationClient.ProlongAuthToken(realm, oldToken);
+        }
+    }
+}
diff --git a/WotBlitzStatisticsPro.GraphQl/Startup.cs b/WotBlitzStatisticsPro.GraphQl/Startup.cs
index 17a7541..5f207d2 100644
--- a/WotBlitzStatisticsPro.GraphQl/Startup.cs
+++ b/WotBlitzStatisticsPro.GraphQl/Startup.cs
@@ -94,6 +94,7 @@ namespace WotBlitzStatisticsPro.GraphQl
                 .AddMutationType(d => d.Name("Mutation"))
                     .AddType<WotBlitzStatisticsMutation>()
                     .AddType<AuthenticationMutation>()
+                    .AddType<WargamingAuthMutation>()
                 .AddType<AccountsSearchItemObjectType>()
                 .AddEnumType<MarkOfMastery>()
                 .AddEnumType<RealmType>()
diff --git a/WotBlitzStatisticsPro.WgApiClient/IWargamingAuthenticationClient.cs b/WotBlitzStatisticsPro.WgApiClient/IWargamingAuthenticationClient.cs
index 5f1c51a..746e28c 100644
--- a/WotBlitzStatisticsPro.WgApiClient/IWargamingAuthenticationClient.cs
+++ b/WotBlitzStatisticsPro.WgApiClient/IWargamingAuthenticationClient.cs
@@ -6,5 +6,7 @@ namespace WotBlitzStatisticsPro.WgApiClient
     public interface IWargamingAuthenticationClient
     {
         string LoginUrl(RealmType realm);
+
+        Task<WargamingProlongInfo> ProlongAuthToken(RealmType realm, string oldToken);
     }
 }
diff --git a/WotBlitzStatisticsPro.WgApiClient/Model/WotAuthProlongateResponse.cs b/WotBlitzStatisticsPro.WgApiClient/Model/WotAuthProlongateResponse.cs
new file mode 100644
index 0000000..593e718
--- /dev/null
+++ b/WotBlitzStatisticsPro.WgApiClient/Model/WotAuthProlongateResponse.cs
@@ -0,0 +1,16 @@
+using Newtonsoft.Json;
+
+namespace WotBlitzStatisticsPro.WgApiClient.Model
+{
+    public class WotAuthProlongateResponse
+    {
+		[JsonProperty("access_token")]
+		public string AccessToken { get; set; } = string.Empty;
+
+		[JsonProperty("account_id")]
+		public long AccountId { get; set; }
+
+		[JsonProperty("expires_at")]
+		public int ExpirationTimeStamp { get; set; }
+	}
+}
diff --git a/WotBlitzStatisticsPro.WgApiClient/WagramingApiClientBase.cs b/WotBlitzStatisticsPro.WgApiClient/WagramingApiClientBase.cs
index 25c52d6..34a8efb 100644
--- a/WotBlitzStatisticsPro.WgApiClient/WagramingApiClientBase.cs
+++ b/WotBlitzStatisticsPro.WgApiClient/WagramingApiClientBase.cs
@@ -41,7 +41,7 @@ namespace WotBlitzStatisticsPro.WgApiClient
 			_wotApiUrls[RealmType.Asia] = "https://api.worldoftanks.asia/wot/";
 		}
 
-		protected async Task<T?> GetFromBlitzApi<T>(
+		protected Task<T?> GetFromBlitzApi<T>(
 			RealmType realmType,
 			RequestLanguage language,
 			string method,
@@ -49,10 +49,27 @@ namespace WotBlitzStatisticsPro.WgApiClient
 		{
 			string uri = GetBlitzUri(realmType, language, method, queryParameters);
 
+			return CallWgApi<T>(uri);
+        }
+
+		protected async Task<T?> CallWgApi<T>(string uri, bool postMethod = false) where T : class
+		{
 			_httpClient.DefaultRequestHeaders.Accept.Clear();
 			_httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
 
-			var response = await _httpClient.GetAsync(uri);
+			HttpResponseMessage? response;
+			if(postMethod)
+            {
+				// Create httpContent
+				var requestBody = TransformUriToRequestBody(uri);
+				var httpContent = new StringContent(requestBody, Encoding.UTF8, "application/x-www-form-urlencoded");
+
+				response = await _httpClient.PostAsync(uri, httpContent);
+            }
+            else
+            {
+				response = await _httpClient.GetAsync(uri);
+			}
 			response.EnsureSuccessStatusCode();
 			var responseString = await response.Content.ReadAsStringAsync();
 
@@ -61,19 +78,20 @@ namespace WotBlitzStatisticsPro.WgApiClient
 			_logger.LogInformation($"HTTP GET {uri} - {responseBody.Status}");
 
 			switch (responseBody.Status)
-            {
-                case "ok":
-                    return responseBody.Data;
-                case "error":
-                {
-                    var error = responseBody.Error;
-                    var message = $"Field:{(error?.Field ?? "undefined")}  Message:{(error?.Message ?? "undefined")}  Value:{(error?.Value ?? "undefined")}  Code:{(error?.Code ?? "undefined")}";
-                    throw new ArgumentException(message);
-                }
-                default:
-                    throw new ArgumentException($"Unexpected response body status '{responseBody.Status}'");
-            }
-        }
+			{
+				case "ok":
+					return responseBody.Data;
+				case "error":
+					{
+						var error = responseBody.Error;
+						var message = $"Field:{(error?.Field ?? "undefined")}  Message:{(error?.Message ?? "undefined")}  Value:{(error?.Value ?? "undefined")}  Code:{(error?.Code ?? "undefined")}";
+						throw new ArgumentException(message);
+					}
+				default:
+					throw new ArgumentException($"Unexpected response body status '{responseBody.Status}'");
+			}
+		}
+
 
 		protected string GetWotUri(RealmType realmType, string method, string[]? queryParameters)
 		{
@@ -108,5 +126,10 @@ namespace WotBlitzStatisticsPro.WgApiClient
 			}
 			return uri.ToString();
 		}
+
+		private string TransformUriToRequestBody(string request)
+		{
+			return request.Substring(request.IndexOf('?') + 1);
+		}
 	}
 }
diff --git a/WotBlitzStatisticsPro.WgApiClient/WargamingApiClient.cs b/WotBlitzStatisticsPro.WgApiClient/WargamingApiClient.cs
index 02bd27d..46672ae 100644
--- a/WotBlitzStatisticsPro.WgApiClient/WargamingApiClient.cs
+++ b/WotBlitzStatisticsPro.WgApiClient/WargamingApiClient.cs
@@ -215,6 +215,23 @@ namespace WotBlitzStatisticsPro.WgApiClient
             return GetWotUri(realm, "auth/login/", null);
         }
 
+        public async Task<WargamingProlongInfo> ProlongAuthToken(RealmType realm, string oldToken)
+        {
+            // https://api.worldoftanks.ru/wot/auth/prolongate/?application_id=98805e6ac535e88491ae64d37b764370&access_token=1234566
+            string prolongUri = GetWotUri(
+                realm,
+                "auth/prolongate/",
+                new string[] { $"access_token={oldToken}" });
+            var prolongResult = await CallWgApi<WotAuthProlongateResponse>(prolongUri, true);
+
+            return new WargamingProlongInfo
+            {
+                AccessToken = prolongResult!.AccessToken,
+                AccountId = prolongResult.AccountId,
+                ExpirationTimeStamp = prolongResult.ExpirationTimeStamp
+            };
+        }
+
         #endregion
     }
 }