diff --git a/WireGuard/WireGuard.xcodeproj/project.pbxproj b/WireGuard/WireGuard.xcodeproj/project.pbxproj
index 77be308..d2e8b50 100644
--- a/WireGuard/WireGuard.xcodeproj/project.pbxproj
+++ b/WireGuard/WireGuard.xcodeproj/project.pbxproj
@@ -298,6 +298,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				PRODUCT_BUNDLE_IDENTIFIER = "$(APP_ID)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
@@ -315,6 +316,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				PRODUCT_BUNDLE_IDENTIFIER = "$(APP_ID)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
diff --git a/WireGuard/WireGuard/Config/Developer.xcconfig.template b/WireGuard/WireGuard/Config/Developer.xcconfig.template
index 42cc57d..961699a 100644
--- a/WireGuard/WireGuard/Config/Developer.xcconfig.template
+++ b/WireGuard/WireGuard/Config/Developer.xcconfig.template
@@ -3,5 +3,7 @@
 // You Apple developer account's Team ID
 DEVELOPMENT_TEAM = <team_id>
 
-// The bundle identifier of this app
-PRODUCT_BUNDLE_IDENTIFIER = <app_id>
+// The bundle identifier of this app.
+// Should be an app id created at developer.apple.com
+// with Network Extensions capabilty.
+APP_ID = <app_id>