diff --git a/FileBrowser/FBFile.swift b/FileBrowser/FBFile.swift
index fdda8a8..ff3869d 100644
--- a/FileBrowser/FBFile.swift
+++ b/FileBrowser/FBFile.swift
@@ -9,9 +9,9 @@
 import Foundation
 
 /// FBFile is a class representing a file in FileBrowser
-open class FBFile: NSObject {
+@objc open class FBFile: NSObject {
     /// Display name. String.
-    open let displayName: String
+    @objc open let displayName: String
     // is Directory. Bool.
     open let isDirectory: Bool
     /// File extension.
diff --git a/FileBrowser/FileListViewController.swift b/FileBrowser/FileListViewController.swift
index a06ed8c..936a9bd 100644
--- a/FileBrowser/FileListViewController.swift
+++ b/FileBrowser/FileListViewController.swift
@@ -105,7 +105,7 @@ class FileListViewController: UIViewController {
     //MARK: Data
     
     func indexFiles() {
-        let selector: Selector = #selector(getter: UIPrinter.displayName)
+        let selector: Selector = #selector(getter: FBFile.displayName)
         sections = Array(repeating: [], count: collation.sectionTitles.count)
         if let sortedObjects = collation.sortedArray(from: files, collationStringSelector: selector) as? [FBFile]{
             for object in sortedObjects {
diff --git a/examples/Sample/Sample.xcodeproj/project.pbxproj b/examples/Sample/Sample.xcodeproj/project.pbxproj
index d9aacbf..c202da3 100644
--- a/examples/Sample/Sample.xcodeproj/project.pbxproj
+++ b/examples/Sample/Sample.xcodeproj/project.pbxproj
@@ -153,7 +153,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0800;
-				LastUpgradeCheck = 0830;
+				LastUpgradeCheck = 0900;
 				ORGANIZATIONNAME = "Mihail Șalari";
 				TargetAttributes = {
 					48A199AC1D8C53AC00C443D3 = {
@@ -239,7 +239,9 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
@@ -247,7 +249,11 @@
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_SUSPICIOUS_MOVES = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
@@ -277,6 +283,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -290,7 +297,9 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
@@ -298,7 +307,11 @@
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_SUSPICIOUS_MOVES = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
@@ -320,6 +333,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 			};
@@ -339,7 +353,6 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
 			};
 			name = Debug;
 		};
@@ -356,7 +369,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.roymarmelstein.Sample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
-				SWIFT_VERSION = 3.0;
 			};
 			name = Release;
 		};
diff --git a/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme b/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
index b61189c..d99945b 100644
--- a/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
+++ b/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0830"
+   LastUpgradeVersion = "0900"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,6 +26,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
@@ -45,6 +46,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"