diff --git a/Base32.xcodeproj/project.pbxproj b/Base32.xcodeproj/project.pbxproj
index e3232e2..fe3cb87 100644
--- a/Base32.xcodeproj/project.pbxproj
+++ b/Base32.xcodeproj/project.pbxproj
@@ -536,6 +536,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 6CA0A7B81A74E88E00AC539F /* Debug.xcconfig */;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				CURRENT_PROJECT_VERSION = 1;
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
@@ -550,6 +551,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 6CA0A7BA1A74E88E00AC539F /* Release.xcconfig */;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				CURRENT_PROJECT_VERSION = 1;
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;