diff --git a/mas-cli.xcodeproj/project.pbxproj b/mas-cli.xcodeproj/project.pbxproj
index 9c42b65..6635f0c 100644
--- a/mas-cli.xcodeproj/project.pbxproj
+++ b/mas-cli.xcodeproj/project.pbxproj
@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 48;
+	objectVersion = 50;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -392,7 +392,7 @@
 				};
 			};
 			buildConfigurationList = ED031A731B5127C00097692E /* Build configuration list for PBXProject "mas-cli" */;
-			compatibilityVersion = "Xcode 8.0";
+			compatibilityVersion = "Xcode 9.3";
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
@@ -556,6 +556,7 @@
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mphys.mas-cli";
+				SWIFT_COMPILATION_MODE = singlefile;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 3.0;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -635,8 +636,9 @@
 				CONFIGURATION_BUILD_DIR = "$(PROJECT_DIR)/build";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mphys.mas-cli";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OBJC_BRIDGING_HEADER = "App/mas-cli-Bridging-Header.h";
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
@@ -655,7 +657,11 @@
 				COPY_PHASE_STRIP = NO;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = AppTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/../Frameworks",
+				);
 				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mphys.mas-cli.tests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -679,12 +685,17 @@
 				COPY_PHASE_STRIP = NO;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = AppTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/../Frameworks",
+				);
 				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mphys.mas-cli.tests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_VERSION = 4.0;
 			};
 			name = Release;