diff --git a/V2rayU.xcodeproj/project.pbxproj b/V2rayU.xcodeproj/project.pbxproj
index 914c39d..a723121 100644
--- a/V2rayU.xcodeproj/project.pbxproj
+++ b/V2rayU.xcodeproj/project.pbxproj
@@ -834,7 +834,7 @@
 				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 4.2.3;
+				CURRENT_PROJECT_VERSION = 4.2.4;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = "";
 				"DEVELOPMENT_TEAM[sdk=macosx*]" = "";
@@ -846,7 +846,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 11.0;
-				MARKETING_VERSION = 4.2.3;
+				MARKETING_VERSION = 4.2.4;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = net.yanue.V2rayU;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -872,7 +872,7 @@
 				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 4.2.3;
+				CURRENT_PROJECT_VERSION = 4.2.4;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = "";
 				"DEVELOPMENT_TEAM[sdk=macosx*]" = "";
@@ -884,7 +884,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 11.0;
-				MARKETING_VERSION = 4.2.3;
+				MARKETING_VERSION = 4.2.4;
 				ONLY_ACTIVE_ARCH = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = net.yanue.V2rayU;
 				PRODUCT_NAME = "$(TARGET_NAME)";
diff --git a/V2rayU/Import.swift b/V2rayU/Import.swift
index 89b4e2c..3c2785c 100644
--- a/V2rayU/Import.swift
+++ b/V2rayU/Import.swift
@@ -316,9 +316,6 @@ class ImportUri {
         if vmess.security.isEmpty {
             vmess.security = "none"
         }
-        if vmess.flow.isEmpty {
-            vmess.flow = "xtls-rprx-vision"
-        }
         if vmess.sni.count == 0 {
             vmess.sni = vmess.address
         }
diff --git a/V2rayU/Uri.swift b/V2rayU/Uri.swift
index 1a0a25e..62dc085 100644
--- a/V2rayU/Uri.swift
+++ b/V2rayU/Uri.swift
@@ -583,9 +583,6 @@ class VlessUri {
                 break
             case "flow":
                 self.flow = item.value as! String
-                if self.flow.isEmpty {
-                    self.flow = "xtls-rprx-vision"
-                }
                 break
             case "encryption":
                 self.encryption = item.value as! String
diff --git a/V2rayU/v2ray/V2rayConfig.swift b/V2rayU/v2ray/V2rayConfig.swift
index ce09939..6790119 100644
--- a/V2rayU/v2ray/V2rayConfig.swift
+++ b/V2rayU/v2ray/V2rayConfig.swift
@@ -770,9 +770,6 @@ class V2rayConfig: NSObject {
                         user.id = val["id"].stringValue
                         user.flow = val["flow"].stringValue
                         user.encryption = val["encryption"].stringValue
-                        if user.flow.isEmpty {
-                            user.flow = "xtls-rprx-vision"
-                        }
                         if user.encryption.isEmpty {
                             user.encryption = "none"
                         }