diff --git a/CalendarKit-Swift.xcodeproj/project.pbxproj b/CalendarKit-Swift.xcodeproj/project.pbxproj
index d27e295..87d31d9 100644
--- a/CalendarKit-Swift.xcodeproj/project.pbxproj
+++ b/CalendarKit-Swift.xcodeproj/project.pbxproj
@@ -351,29 +351,34 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0910;
-				LastUpgradeCheck = 0910;
+				LastUpgradeCheck = 1140;
 				ORGANIZATIONNAME = "Maurice Arikoglu";
 				TargetAttributes = {
 					51873BE01FD375CF0000E9C5 = {
 						CreatedOnToolsVersion = 9.1;
+						LastSwiftMigration = 1140;
 						ProvisioningStyle = Automatic;
 					};
 					51873BE81FD375D00000E9C5 = {
 						CreatedOnToolsVersion = 9.1;
+						LastSwiftMigration = 1140;
 						ProvisioningStyle = Automatic;
 						TestTargetID = 51A1D2FD1FCF4A5C00963B5F;
 					};
 					51A1D2FD1FCF4A5C00963B5F = {
 						CreatedOnToolsVersion = 9.1;
+						LastSwiftMigration = 1140;
 						ProvisioningStyle = Automatic;
 					};
 					51A1D3111FCF4A5D00963B5F = {
 						CreatedOnToolsVersion = 9.1;
+						LastSwiftMigration = 1140;
 						ProvisioningStyle = Automatic;
 						TestTargetID = 51A1D2FD1FCF4A5C00963B5F;
 					};
 					51A1D31C1FCF4A5D00963B5F = {
 						CreatedOnToolsVersion = 9.1;
+						LastSwiftMigration = 1140;
 						ProvisioningStyle = Automatic;
 						TestTargetID = 51A1D2FD1FCF4A5C00963B5F;
 					};
@@ -560,7 +565,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.mauricearikoglu.SwiftCal;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -585,7 +590,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.mauricearikoglu.SwiftCal;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -602,7 +607,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.mauricearikoglu.SwiftCalTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/CalendarKit-Swift.app/CalendarKit-Swift";
 			};
@@ -618,7 +623,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.mauricearikoglu.SwiftCalTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/CalendarKit-Swift.app/CalendarKit-Swift";
 			};
@@ -638,6 +643,7 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
@@ -645,6 +651,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -695,6 +702,7 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
@@ -702,6 +710,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -743,7 +752,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mauricearikoglu.CalendarKit-Swift";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -760,7 +769,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mauricearikoglu.CalendarKit-Swift";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
@@ -776,7 +785,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mauricearikoglu.CalendarKit-SwiftTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/CalendarKit-Swift.app/CalendarKit-Swift";
 			};
@@ -793,7 +802,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mauricearikoglu.CalendarKit-SwiftTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/CalendarKit-Swift.app/CalendarKit-Swift";
 			};
@@ -809,7 +818,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mauricearikoglu.CalendarKit-SwiftUITests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_TARGET_NAME = "CalendarKit-Swift";
 			};
@@ -825,7 +834,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mauricearikoglu.CalendarKit-SwiftUITests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_TARGET_NAME = "CalendarKit-Swift";
 			};
diff --git a/CalendarKit-Swift.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/CalendarKit-Swift.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/CalendarKit-Swift.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/CalendarKit-Swift/AppDelegate.swift b/CalendarKit-Swift/AppDelegate.swift
index f0af77f..6291794 100644
--- a/CalendarKit-Swift/AppDelegate.swift
+++ b/CalendarKit-Swift/AppDelegate.swift
@@ -14,7 +14,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     var window: UIWindow?
 
 
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         // Override point for customization after application launch.
         return true
     }