diff --git a/ClashX/AppDelegate.swift b/ClashX/AppDelegate.swift
index 8edd003..a86de1e 100644
--- a/ClashX/AppDelegate.swift
+++ b/ClashX/AppDelegate.swift
@@ -82,8 +82,8 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         removeUnExistProxyGroups()
 
         // start proxy
-        setupData()
         updateConfig(showNotification: false)
+        setupData()
         updateLoggingLevel()
 
         // start watch config file change
diff --git a/ClashX/General/ApiRequest.swift b/ClashX/General/ApiRequest.swift
index 85e2fc8..27bec63 100644
--- a/ClashX/General/ApiRequest.swift
+++ b/ClashX/General/ApiRequest.swift
@@ -16,10 +16,6 @@ protocol ApiRequestStreamDelegate: class {
     func didGetLog(log: String, level: String)
 }
 
-enum RequestError: Error {
-    case decodeFail
-}
-
 typealias ErrorString = String
 
 class ApiRequest {
@@ -73,15 +69,12 @@ class ApiRequest {
 
     static func requestConfig(completeHandler: @escaping ((ClashConfig) -> Void)) {
         if !ConfigManager.builtInApiMode {
-            req("/configs").responseData {
-                res in
-                do {
-                    let data = try res.result.get()
-                    guard let config = ClashConfig.fromData(data) else {
-                        throw RequestError.decodeFail
-                    }
+            req("/configs").responseDecodable(of: ClashConfig.self) {
+                resp in
+                switch resp.result {
+                case let .success(config):
                     completeHandler(config)
-                } catch let err {
+                case let .failure(err):
                     Logger.log(err.localizedDescription)
                     NSUserNotificationCenter.default.post(title: "Error", info: err.localizedDescription)
                 }
@@ -156,14 +149,20 @@ class ApiRequest {
             ApiRequest.shared.proxyRespCache = proxies
             completeHandler?(proxies)
         }
-        return
     }
 
     static func requestProxyProviderList(completeHandler: ((ClashProviderResp) -> Void)? = nil) {
-        req("/providers/proxies").responseData { res in
-            let provider = ClashProviderResp.create(try? res.result.get())
-            completeHandler?(provider)
-        }
+        req("/providers/proxies")
+            .responseDecodable(of: ClashProviderResp.self, decoder: ClashProviderResp.decoder) { resp in
+                switch resp.result {
+                case let .success(providerResp):
+                    completeHandler?(providerResp)
+                case let .failure(err):
+                    print(err)
+                    completeHandler?(ClashProviderResp())
+                    assertionFailure()
+                }
+            }
     }
 
     static func updateAllowLan(allow: Bool, completeHandler: (() -> Void)? = nil) {
@@ -236,10 +235,14 @@ class ApiRequest {
 
 extension ApiRequest {
     static func getConnections(completeHandler: @escaping ([ClashConnectionSnapShot.Connection]) -> Void) {
-        req("/connections").responseData { res in
-            guard let data = try? res.result.get() else { return }
-            let resp = ClashConnectionSnapShot.fromData(data)
-            completeHandler(resp.connections)
+        req("/connections").responseDecodable(of: ClashConnectionSnapShot.self) { resp in
+            switch resp.result {
+            case let .success(snapshot):
+                completeHandler(snapshot.connections)
+            case .failure:
+                assertionFailure()
+                completeHandler([])
+            }
         }
     }
 
diff --git a/ClashX/Models/ClashConnection.swift b/ClashX/Models/ClashConnection.swift
index d79fbb9..0cc323d 100644
--- a/ClashX/Models/ClashConnection.swift
+++ b/ClashX/Models/ClashConnection.swift
@@ -10,12 +10,6 @@ import Cocoa
 
 struct ClashConnectionSnapShot: Codable {
     let connections: [Connection]
-
-    static func fromData(_ data: Data) -> ClashConnectionSnapShot {
-        let decoder = JSONDecoder()
-        let model = try? decoder.decode(ClashConnectionSnapShot.self, from: data)
-        return model ?? ClashConnectionSnapShot(connections: [])
-    }
 }
 
 extension ClashConnectionSnapShot {
diff --git a/ClashX/Models/ClashProvider.swift b/ClashX/Models/ClashProvider.swift
index d9665a6..34734b1 100644
--- a/ClashX/Models/ClashProvider.swift
+++ b/ClashX/Models/ClashProvider.swift
@@ -14,15 +14,14 @@ class ClashProviderResp: Codable {
         return allProviders.filter({ $0.value.vehicleType != .Compatible })
     }()
 
-    private init() {
+    init() {
         allProviders = [:]
     }
 
-    static func create(_ data: Data?) -> ClashProviderResp {
-        guard let data = data else { return ClashProviderResp() }
+    static var decoder: JSONDecoder {
         let decoder = JSONDecoder()
         decoder.dateDecodingStrategy = .formatted(DateFormatter.js)
-        return (try? decoder.decode(ClashProviderResp.self, from: data)) ?? ClashProviderResp()
+        return decoder
     }
 
     private enum CodingKeys: String, CodingKey {