diff --git a/README.md b/README.md
index ba40497..70dc8fc 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ package_rename_config:
   ios:
     app_name: # (String) The display name of the ios app
     bundle_name: # (String) The bundle name of the ios app
+    override_old_package: # (String) Use this to replace the old bundle identifier with the new bundle identifier
     package_name: # (String) The product bundle identifier of the ios app
 
   linux:
diff --git a/example/example.md b/example/example.md
index 876cfed..a14e396 100644
--- a/example/example.md
+++ b/example/example.md
@@ -5,12 +5,13 @@ package_rename_config:
   android:
     app_name: Package Rename Demo
     package_name: rocks.outdatedguy.packagerenamedemo
-    override_old_package: com.example.example
+    override_old_package: com.example.package_rename_example
     lang: kotlin
 
   ios:
     app_name: Package Rename Demo
     bundle_name: renamedemo
+    override_old_package: com.example.packageRenameExample
     package_name: rocks.outdatedguy.packagerenamedemo
 
   web:
diff --git a/example/package_rename_config.yaml b/example/package_rename_config.yaml
index c94b61d..3df9286 100644
--- a/example/package_rename_config.yaml
+++ b/example/package_rename_config.yaml
@@ -8,6 +8,7 @@ package_rename_config:
   ios:
     app_name: Package Rename Demo
     bundle_name: renamedemo
+    override_old_package: com.example.packageRenameExample
     package_name: rocks.outdatedguy.packagerenamedemo
 
   web:
diff --git a/example/pubspec.lock b/example/pubspec.lock
index fa5f288..1bbad23 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -134,10 +134,10 @@ packages:
     dependency: transitive
     description:
       name: vector_math
-      sha256: d530bd74fea330e6e364cda7a85019c434070188383e1cd8d9777ee586914c5b
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.0"
+    version: "2.1.4"
   yaml:
     dependency: transitive
     description:
diff --git a/lib/platforms/ios.dart b/lib/platforms/ios.dart
index 1914109..760d27a 100644
--- a/lib/platforms/ios.dart
+++ b/lib/platforms/ios.dart
@@ -9,7 +9,10 @@ void _setIOSConfigurations(dynamic iosConfig) {
 
     _setIOSDisplayName(iosConfigMap[_appNameKey]);
     _setIOSBundleName(iosConfigMap[_bundleNameKey]);
-    _setIOSPackageName(iosConfigMap[_packageNameKey]);
+    _setIOSPackageName(
+      oldPackageName: iosConfigMap[_overrideOldPackageKey],
+      packageName: iosConfigMap[_packageNameKey],
+    );
   } on _PackageRenameException catch (e) {
     _logger
       ..e('${e.message}ERR Code: ${e.code}')
@@ -96,7 +99,10 @@ void _setIOSBundleName(dynamic bundleName) {
   }
 }
 
-void _setIOSPackageName(dynamic packageName) {
+void _setIOSPackageName({
+  dynamic oldPackageName,
+  dynamic packageName,
+}) {
   try {
     if (packageName == null) return;
     if (packageName is! String) throw _PackageRenameErrors.invalidPackageName;
@@ -111,26 +117,25 @@ void _setIOSPackageName(dynamic packageName) {
         // Replaces old bundle id from
         // `PRODUCT_BUNDLE_IDENTIFIER = {{BUNDLE_ID}};`
         .replaceAll(
-          RegExp(
-            r'PRODUCT_BUNDLE_IDENTIFIER = ([A-Za-z0-9.-_]+)(?<!\.RunnerTests);',
-          ),
-          'PRODUCT_BUNDLE_IDENTIFIER = $packageName;',
-        )
-        // Replaces old bundle id from
-        // `PRODUCT_BUNDLE_IDENTIFIER = {{BUNDLE_ID}}.RunnerTests;`
-        .replaceAll(
-          RegExp('PRODUCT_BUNDLE_IDENTIFIER = (.*?).RunnerTests;'),
-          'PRODUCT_BUNDLE_IDENTIFIER = $packageName.RunnerTests;',
-        )
+      RegExp(
+        'PRODUCT_BUNDLE_IDENTIFIER = $oldPackageName(?<!\\.RunnerTests);',
+      ),
+      'PRODUCT_BUNDLE_IDENTIFIER = $packageName;',
+    )
         // Removes old bundle id from
         // `PRODUCT_BUNDLE_IDENTIFIER = "{{BUNDLE_ID}}.{{EXTENSION_NAME}}";`
         .replaceAllMapped(
       RegExp(
-        r'PRODUCT_BUNDLE_IDENTIFIER = "([A-Za-z0-9.-_]+)\.([A-Za-z0-9.-_]+)";',
+        'PRODUCT_BUNDLE_IDENTIFIER = $oldPackageName\\.([A-Za-z0-9.-_]+);',
       ),
       (match) {
-        final extensionName = match.group(2);
-        return 'PRODUCT_BUNDLE_IDENTIFIER = "$packageName.$extensionName";';
+        final extensionName = match.group(1);
+        final isContains = packageName.contains(extensionName.toString());
+        if (isContains) {
+          return 'PRODUCT_BUNDLE_IDENTIFIER = $packageName;';
+        } else {
+          return 'PRODUCT_BUNDLE_IDENTIFIER = $packageName.$extensionName;';
+        }
       },
     );