diff --git a/SwiftWebVC/SwiftWebVC.swift b/SwiftWebVC/SwiftWebVC.swift
index 584e273..58a901c 100755
--- a/SwiftWebVC/SwiftWebVC.swift
+++ b/SwiftWebVC/SwiftWebVC.swift
@@ -130,7 +130,9 @@ public class SwiftWebVC: UIViewController {
         navBarTitle.backgroundColor = UIColor.clear
         if presentingViewController == nil {
             if let titleAttributes = navigationController!.navigationBar.titleTextAttributes {
-                navBarTitle.textColor = titleAttributes[.foregroundColor] as? UIColor
+                if let navBarTitleColor = titleAttributes[.foregroundColor] as? UIColor {
+                    navBarTitle.textColor = navBarTitleColor
+                }
             }
         }
         else {
diff --git a/SwiftWebVCFramework/SwiftWebVCFramework.xcodeproj/project.pbxproj b/SwiftWebVCFramework/SwiftWebVCFramework.xcodeproj/project.pbxproj
index 67c4f98..c6e878a 100644
--- a/SwiftWebVCFramework/SwiftWebVCFramework.xcodeproj/project.pbxproj
+++ b/SwiftWebVCFramework/SwiftWebVCFramework.xcodeproj/project.pbxproj
@@ -344,7 +344,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.swiftweb.SwiftWebVCFramework;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -363,7 +363,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.swiftweb.SwiftWebVCFramework;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};