diff --git a/PathMenu.xcodeproj/project.pbxproj b/PathMenu.xcodeproj/project.pbxproj
index 8d2e178..2484e93 100644
--- a/PathMenu.xcodeproj/project.pbxproj
+++ b/PathMenu.xcodeproj/project.pbxproj
@@ -662,7 +662,7 @@
 				PROVISIONING_PROFILE = "f3bd9f9c-c781-4a84-a4b9-d221e4ac54ef";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -690,7 +690,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "f3bd9f9c-c781-4a84-a4b9-d221e4ac54ef";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
diff --git a/PathMenu/PathMenu.swift b/PathMenu/PathMenu.swift
index 89b3e3f..88e9c1a 100644
--- a/PathMenu/PathMenu.swift
+++ b/PathMenu/PathMenu.swift
@@ -173,7 +173,7 @@ public class PathMenu: UIView {
         }
     }
     
-    public func expand() {
+    @objc public func expand() {
         if flag == menuItems.count {
             timer?.invalidate()
             timer = nil
@@ -215,7 +215,7 @@ public class PathMenu: UIView {
         flag += 1
     }
     
-    public func close() {
+    @objc public func close() {
         if flag == -1 {
             timer?.invalidate()
             timer = nil