diff --git a/mas-cli.xcodeproj/project.pbxproj b/mas-cli.xcodeproj/project.pbxproj
index bfb028f..70c3077 100644
--- a/mas-cli.xcodeproj/project.pbxproj
+++ b/mas-cli.xcodeproj/project.pbxproj
@@ -501,7 +501,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mphys.mas-cli";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "mas-cli/mas-cli-Bridging-Header.h";
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 			};
 			name = Release;
 		};