diff --git a/SwiftLintXcode.xcodeproj/project.pbxproj b/SwiftLintXcode.xcodeproj/project.pbxproj
index 84e7c18..41ce247 100644
--- a/SwiftLintXcode.xcodeproj/project.pbxproj
+++ b/SwiftLintXcode.xcodeproj/project.pbxproj
@@ -117,6 +117,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 			);
 			mainGroup = 04E4BF271CB25D3100BC7305;
@@ -254,7 +255,7 @@
 				PRODUCT_NAME = SwiftLintXcode;
 				SWIFT_OBJC_BRIDGING_HEADER = "SwiftLintXcode/SwiftLintXcode-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 5.0;
 				WRAPPER_EXTENSION = xcplugin;
 			};
 			name = Debug;
@@ -274,7 +275,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = net.ypresto.SwiftLintXcode;
 				PRODUCT_NAME = SwiftLintXcode;
 				SWIFT_OBJC_BRIDGING_HEADER = "SwiftLintXcode/SwiftLintXcode-Bridging-Header.h";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 5.0;
 				WRAPPER_EXTENSION = xcplugin;
 			};
 			name = Release;