diff --git a/.github/dev.yml b/.github/dev.yml
index dd9224a..9d831ea 100644
--- a/.github/dev.yml
+++ b/.github/dev.yml
@@ -1,7 +1,7 @@
 pr: none
 trigger: [ master ]
 
-name: 3.5.9-dev.$(Rev:r)
+name: 3.5.10-dev.$(Rev:r)
 
 pool:
   vmImage: ubuntu-latest
diff --git a/src/Client.cs b/src/Client.cs
index 0b15116..67b3f0d 100644
--- a/src/Client.cs
+++ b/src/Client.cs
@@ -143,6 +143,7 @@ namespace WTelegram
 			"lang_code" => CultureInfo.CurrentUICulture.TwoLetterISOLanguageName,
 			"user_id" => "-1",
 			"verification_code" or "email_verification_code" or "password" => AskConfig(what),
+			"init_params" => "{}",
 			_ => null // api_id api_hash phone_number... it's up to you to reply to these correctly
 		};
 
@@ -857,9 +858,11 @@ namespace WTelegram
 					await CreateAuthorizationKey(this, _dcSession);
 
 				var keepAliveTask = KeepAlive(_cts.Token);
+				var initParams = JSONValue.FromJsonElement(System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.JsonElement>(Config("init_params")));
 				TLConfig = await this.InvokeWithLayer(Layer.Version,
 					new TL.Methods.InitConnection<Config>
 					{
+						flags = TL.Methods.InitConnection<Config>.Flags.has_params,
 						api_id = _session.ApiId,
 						device_model = Config("device_model"),
 						system_version = Config("system_version"),
@@ -867,6 +870,7 @@ namespace WTelegram
 						system_lang_code = Config("system_lang_code"),
 						lang_pack = Config("lang_pack"),
 						lang_code = Config("lang_code"),
+						params_ = initParams,
 						query = new TL.Methods.Help_GetConfig()
 					});
 				_session.DcOptions = TLConfig.dc_options;
diff --git a/src/TL.Helpers.cs b/src/TL.Helpers.cs
index 694ac24..746a734 100644
--- a/src/TL.Helpers.cs
+++ b/src/TL.Helpers.cs
@@ -639,7 +639,19 @@ namespace TL
 	}
 
 	partial class JsonObjectValue { public override string ToString() => $"{HttpUtility.JavaScriptStringEncode(key, true)}:{value}"; }
-	partial class JSONValue		{ public abstract object ToNative(); }
+	partial class JSONValue		{ public abstract object ToNative();
+		private static JsonObjectValue FromJsonProperty(System.Text.Json.JsonProperty p) => new() { key = p.Name, value = FromJsonElement(p.Value) };
+		public static JSONValue FromJsonElement(System.Text.Json.JsonElement elem) => elem.ValueKind switch
+		{
+			System.Text.Json.JsonValueKind.True or
+			System.Text.Json.JsonValueKind.False => new JsonBool { value = elem.GetBoolean() },
+			System.Text.Json.JsonValueKind.Object => new JsonObject { value = elem.EnumerateObject().Select(FromJsonProperty).ToArray() },
+			System.Text.Json.JsonValueKind.Array => new JsonArray { value = elem.EnumerateArray().Select(FromJsonElement).ToArray() },
+			System.Text.Json.JsonValueKind.String => new JsonString { value = elem.GetString() },
+			System.Text.Json.JsonValueKind.Number => new JsonNumber { value = elem.GetDouble() },
+			_ => new JsonNull(),
+		};
+	}
 	partial class JsonNull		{ public override object ToNative() => null;  public override string ToString() => "null"; }
 	partial class JsonBool		{ public override object ToNative() => value; public override string ToString() => value ? "true" : "false"; }
 	partial class JsonNumber	{ public override object ToNative() => value; public override string ToString() => value.ToString(CultureInfo.InvariantCulture); }