diff --git a/Tests/Fixtures/CarthageProject/Project.xcodeproj/project.pbxproj b/Tests/Fixtures/CarthageProject/Project.xcodeproj/project.pbxproj
index af08556f..b809ab72 100644
--- a/Tests/Fixtures/CarthageProject/Project.xcodeproj/project.pbxproj
+++ b/Tests/Fixtures/CarthageProject/Project.xcodeproj/project.pbxproj
@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 50;
+	objectVersion = 51;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -312,7 +312,7 @@
 		0FBAE303E3CFC2ABAC876A7719B30922 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1000;
+				LastUpgradeCheck = 1020;
 			};
 			buildConfigurationList = D91E14E36EC0B415578456F264E0161E /* Build configuration list for PBXProject "Project" */;
 			compatibilityVersion = "Xcode 9.3";
@@ -409,8 +409,8 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.2;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_VERSION = 5.0;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -582,7 +582,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};