diff --git a/mapcache-ios.xcodeproj/project.pbxproj b/mapcache-ios.xcodeproj/project.pbxproj
index 46d7d91..c3e590e 100644
--- a/mapcache-ios.xcodeproj/project.pbxproj
+++ b/mapcache-ios.xcodeproj/project.pbxproj
@@ -1447,7 +1447,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				CURRENT_PROJECT_VERSION = 59;
+				CURRENT_PROJECT_VERSION = 60;
 				DEVELOPMENT_TEAM = ZL8G5D9G2H;
 				ENABLE_TESTABILITY = YES;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -1476,7 +1476,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				CURRENT_PROJECT_VERSION = 59;
+				CURRENT_PROJECT_VERSION = 60;
 				DEVELOPMENT_TEAM = ZL8G5D9G2H;
 				GCC_NO_COMMON_BLOCKS = YES;
 				INFOPLIST_FILE = "mapcache-ios/Info.plist";
@@ -1490,6 +1490,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "mapcache-ios/layer/mapcache-ios-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 1;
 			};