diff --git a/Example.xcodeproj/project.pbxproj b/Example.xcodeproj/project.pbxproj
index 042dddb..7e6203b 100644
--- a/Example.xcodeproj/project.pbxproj
+++ b/Example.xcodeproj/project.pbxproj
@@ -288,6 +288,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);
@@ -442,7 +443,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -481,7 +482,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -495,7 +496,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.aschuch.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -508,7 +509,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.aschuch.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -534,7 +535,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -558,7 +559,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "com.aschuch.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -577,7 +578,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.aschuch.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Example.app/Example";
 			};
 			name = Debug;
@@ -590,7 +591,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.aschuch.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0.1;
+				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Example.app/Example";
 			};
 			name = Release;
diff --git a/Example/AppDelegate.swift b/Example/AppDelegate.swift
index 6d11608..dcb82c6 100644
--- a/Example/AppDelegate.swift
+++ b/Example/AppDelegate.swift
@@ -13,7 +13,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
 
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]? = nil) -> Bool {
+    func application(_ application: UIApplication,
+                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
         // Override point for customization after application launch.
         return true
     }
diff --git a/QRCode/CIColorExtension.swift b/QRCode/CIColorExtension.swift
index 40b4435..44dd23b 100644
--- a/QRCode/CIColorExtension.swift
+++ b/QRCode/CIColorExtension.swift
@@ -29,7 +29,7 @@ public extension CIColor {
         var hexValue: CUnsignedLongLong = 0
         
         if scanner.scanHexInt64(&hexValue) {
-            let length = rgba.characters.count
+            let length = rgba.count
             
             switch (length) {
             case 3: