diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8248a6f..a6d5747 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,3 @@
-## 1.6.39
+## 1.6.40
 
-- update: Added deferred deeplinking in ios 
\ No newline at end of file
+- update: version upgrade in class
\ No newline at end of file
diff --git a/README.md b/README.md
index c42a755..31a5e0a 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ You can add the flutter sdk in two ways:-
 
 ```
 dependencies:
-  trackier_sdk_flutter: ^1.6.39
+  trackier_sdk_flutter: ^1.6.40
 ```
 
 2. By using cli command. you need to run the below command in `terminal/cmd`.
diff --git a/android/src/main/kotlin/com/example/trackierfluttersdk/TrackierfluttersdkPlugin.kt b/android/src/main/kotlin/com/example/trackierfluttersdk/TrackierfluttersdkPlugin.kt
index c4488f2..fd6631b 100644
--- a/android/src/main/kotlin/com/example/trackierfluttersdk/TrackierfluttersdkPlugin.kt
+++ b/android/src/main/kotlin/com/example/trackierfluttersdk/TrackierfluttersdkPlugin.kt
@@ -89,7 +89,7 @@ class TrackierfluttersdkPlugin : FlutterPlugin, MethodCallHandler {
             environment = configMap.get("environment") as String
         }
         trackierSDKConfig = TrackierSDKConfig(context, appToken, environment)
-        trackierSDKConfig.setSDKVersion("1.6.33")
+        trackierSDKConfig.setSDKVersion("1.6.40")
         trackierSDKConfig.setSDKType("flutter_sdk")
         trackierSDKConfig.setAppSecret(secretId, secretKey)
     
diff --git a/ios/Classes/SwiftTrackierfluttersdkPlugin.swift b/ios/Classes/SwiftTrackierfluttersdkPlugin.swift
index 6cd5176..d098956 100644
--- a/ios/Classes/SwiftTrackierfluttersdkPlugin.swift
+++ b/ios/Classes/SwiftTrackierfluttersdkPlugin.swift
@@ -81,7 +81,7 @@ public class SwiftTrackierfluttersdkPlugin: NSObject, FlutterPlugin, DeepLinkLis
 		let deeplinkKey = "\(dict?["deeplinkCallback"] as? String ?? "")"
 		let config = TrackierSDKConfig(appToken: appToken , env: environment)
 		config.setAppSecret(secretId: secretId, secretKey: secretKey)
-		config.setSDKVersion(sdkVersion: "1.6.33")
+		config.setSDKVersion(sdkVersion: "1.6.40")
 		if (!deeplinkKey.isEmpty) {
 			config.setDeeplinkListerner(listener: self)
 		}
diff --git a/ios/trackier_sdk_flutter.podspec b/ios/trackier_sdk_flutter.podspec
index b5d1cfd..4eaecb8 100644
--- a/ios/trackier_sdk_flutter.podspec
+++ b/ios/trackier_sdk_flutter.podspec
@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'trackier_sdk_flutter'
-  s.version          = '1.6.39'
+  s.version          = '1.6.40'
   s.summary          = 'Trackier flutter SDK'
   s.description      = <<-DESC
 This is Trackier flutter SDK
diff --git a/pubspec.yaml b/pubspec.yaml
index 42f5238..ea2c6cb 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: trackier_sdk_flutter
 description: This is trackier flutter SDK
-version: 1.6.39
+version: 1.6.40
 homepage: https://github.com/trackier/flutter-sdk
 
 environment: