diff --git a/Core/UDStringExtension.swift b/Core/UDStringExtension.swift
index a3e1567..863b544 100644
--- a/Core/UDStringExtension.swift
+++ b/Core/UDStringExtension.swift
@@ -286,17 +286,19 @@ extension String {
     mutating func udConvertUrls() {
         var count = 0
         var flag = true
+        var string = self
         while count < 9000 && flag {
-            if let range = self.range(of: "<http") {
-                let startIndex = range.lowerBound
+            if let range = string.range(of: "<http") {
+                var startIndex = range.lowerBound
                 var isFindEnd = false
                 var index = 0
                 while !isFindEnd {
-                    if let searchEndIndex = self.index(startIndex, offsetBy: index, limitedBy: self.endIndex), udIsIndexValid(searchEndIndex) {
-                        if self[searchEndIndex] == ">" {
+                    if let searchEndIndex = string.index(startIndex, offsetBy: index, limitedBy: string.endIndex),
+                       udIsIndexValid(searchEndIndex) {
+                        if string[searchEndIndex] == ">" {
                             isFindEnd = true
-                            self = self.replacingOccurrences(of: self[searchEndIndex...searchEndIndex], with: "")
-                            self = self.replacingOccurrences(of: self[startIndex...startIndex], with: "")
+                            string = string.replacingOccurrences(of: self[searchEndIndex...searchEndIndex], with: "")
+                            string = string.replacingOccurrences(of: self[startIndex...startIndex], with: "")
                         }
                     } else {
                         isFindEnd = true
@@ -308,6 +310,7 @@ extension String {
             }
             count += 1
         }
+        self = string
     }
     
     mutating func udConverDoubleLinks() {
diff --git a/Core/UseDeskSDKHelp.swift b/Core/UseDeskSDKHelp.swift
index d8c92de..e0f27e0 100755
--- a/Core/UseDeskSDKHelp.swift
+++ b/Core/UseDeskSDKHelp.swift
@@ -10,7 +10,7 @@ class UseDeskSDKHelp {
         let payload: [String : Any] = [
             "sdk" : "iOS",
             "type" : "sdk",
-            "version" : "3.4.6",
+            "version" : "3.4.7",
             "message_limit" : countMessagesOnInit,
             "userData" : getUserParameters()
         ] 
diff --git a/Example/UseDesk.xcodeproj/project.pbxproj b/Example/UseDesk.xcodeproj/project.pbxproj
index d43b838..9b098e4 100644
--- a/Example/UseDesk.xcodeproj/project.pbxproj
+++ b/Example/UseDesk.xcodeproj/project.pbxproj
@@ -589,7 +589,7 @@
 				INFOPLIST_FILE = "UseDesk/UseDesk-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				MARKETING_VERSION = 3.4.5;
+				MARKETING_VERSION = 3.4.7;
 				MODULE_NAME = ExampleApp;
 				ONLY_ACTIVE_ARCH = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = UseDeskExampleSDK.ru;
@@ -622,7 +622,7 @@
 				INFOPLIST_FILE = "UseDesk/UseDesk-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				MARKETING_VERSION = 3.4.5;
+				MARKETING_VERSION = 3.4.7;
 				MODULE_NAME = ExampleApp;
 				ONLY_ACTIVE_ARCH = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = UseDeskExampleSDK.ru;
diff --git a/UseDesk_SDK_Swift.podspec b/UseDesk_SDK_Swift.podspec
index 4fa7296..e4de9ad 100755
--- a/UseDesk_SDK_Swift.podspec
+++ b/UseDesk_SDK_Swift.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
 	s.name             = 'UseDesk_SDK_Swift'
-	s.version          = '3.4.6'
+	s.version          = '3.4.7'
 	s.summary          = 'A short description of UseDesk.'
 
 	s.homepage         = 'https://github.com/usedesk/UseDeskSwift'