diff --git a/Emojr.xcodeproj/project.pbxproj b/Emojr.xcodeproj/project.pbxproj
index d4443e7..56eead0 100644
--- a/Emojr.xcodeproj/project.pbxproj
+++ b/Emojr.xcodeproj/project.pbxproj
@@ -526,11 +526,11 @@
 					1546D3961CA61A5100D8ECC5 = {
 						CreatedOnToolsVersion = 7.2.1;
 						DevelopmentTeam = M2JNHSR23U;
-						LastSwiftMigration = 0810;
+						LastSwiftMigration = 0920;
 					};
 					1589F8941D27556600451912 = {
 						CreatedOnToolsVersion = 7.3.1;
-						LastSwiftMigration = 0810;
+						LastSwiftMigration = 0920;
 						TestTargetID = 1546D3961CA61A5100D8ECC5;
 					};
 				};
@@ -906,7 +906,8 @@
 				PROVISIONING_PROFILE = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "Emojr-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -931,7 +932,8 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "Emojr-Bridging-Header.h";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -946,7 +948,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.josephpecoraro.EmojrTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Emojr.app/Emojr";
 			};
 			name = Debug;
@@ -962,7 +965,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.josephpecoraro.EmojrTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Emojr.app/Emojr";
 			};
 			name = Release;
diff --git a/Emojr/AccountViewController.swift b/Emojr/AccountViewController.swift
index 3873d05..ec607e5 100644
--- a/Emojr/AccountViewController.swift
+++ b/Emojr/AccountViewController.swift
@@ -16,7 +16,7 @@ extension UILabel {
             let style = NSMutableParagraphStyle()
             style.lineSpacing = height
             
-            string.addAttribute(NSParagraphStyleAttributeName,
+            string.addAttribute(NSAttributedStringKey.paragraphStyle,
                                 value: style,
                                 range: NSRange(location: 0, length: text.characters.count))
             
diff --git a/Emojr/DiscoverViewController.swift b/Emojr/DiscoverViewController.swift
index 70f1476..d6e4d04 100644
--- a/Emojr/DiscoverViewController.swift
+++ b/Emojr/DiscoverViewController.swift
@@ -13,7 +13,7 @@ class DiscoverViewController: TimelineViewController {
     private lazy var searchButton: UIBarButtonItem = {
         let buttonImage = #imageLiteral(resourceName: "searchEmoji").withRenderingMode(.alwaysOriginal)
         let button = UIBarButtonItem(image: buttonImage, style: .plain, target: self, action: #selector(searchButtonTapped))
-        button.setTitleTextAttributes([NSFontAttributeName : UIFont.systemFont(ofSize: 32)], for: UIControlState())
+        button.setTitleTextAttributes([NSAttributedStringKey.font : UIFont.systemFont(ofSize: 32)], for: UIControlState())
         
         return button
     }()
@@ -34,7 +34,7 @@ class DiscoverViewController: TimelineViewController {
     
     // MARK: - Action
     
-    func searchButtonTapped(sender: UIBarButtonItem) {
+    @objc func searchButtonTapped(sender: UIBarButtonItem) {
         if User.sharedInstance.isLoggedIn {
             let addUserVC = AddUsersViewController()
             self.navigationController?.pushViewController(addUserVC, animated: true)
diff --git a/Emojr/EmojiSlotMachine.swift b/Emojr/EmojiSlotMachine.swift
index f5b9465..93317ec 100644
--- a/Emojr/EmojiSlotMachine.swift
+++ b/Emojr/EmojiSlotMachine.swift
@@ -66,7 +66,7 @@ class EmojiSlotMachine: UIView {
         label.text = emojis[randomNumba]
     }
     
-    func randomizeLabels() {
+    @objc func randomizeLabels() {
         for label in emojiStackView.arrangedSubviews {
             if let label = label as? UILabel {
                 randomize(label: label)
diff --git a/Emojr/LoginManager.swift b/Emojr/LoginManager.swift
index 2ab58d6..9c01d03 100644
--- a/Emojr/LoginManager.swift
+++ b/Emojr/LoginManager.swift
@@ -144,7 +144,7 @@ class LoginManager: NSObject {
         navController.navigationBar.barTintColor = blue
         navController.navigationBar.tintColor = UIColor.white
         
-        navController.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName : UIColor.white]
+        navController.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white]
         
         navController.navigationBar.isTranslucent = false
     }
diff --git a/Emojr/TimelineViewController.swift b/Emojr/TimelineViewController.swift
index 08983d3..a3db383 100644
--- a/Emojr/TimelineViewController.swift
+++ b/Emojr/TimelineViewController.swift
@@ -99,7 +99,7 @@ class TimelineViewController: UIViewController {
         } else {
             let buttonImage = #imageLiteral(resourceName: "writeEmoji").withRenderingMode(.alwaysOriginal)
             let postButton = UIBarButtonItem(image: buttonImage, style: .plain, target: self, action: #selector(postButtonTapped))
-            postButton.setTitleTextAttributes([NSFontAttributeName : UIFont.systemFont(ofSize: 32)], for: UIControlState())
+            postButton.setTitleTextAttributes([NSAttributedStringKey.font : UIFont.systemFont(ofSize: 32)], for: UIControlState())
             
             return postButton
         }
@@ -166,7 +166,7 @@ class TimelineViewController: UIViewController {
         noDataView?.removeFromSuperview()
     }
 
-    func refreshData() {
+    @objc func refreshData() {
         tableDataSource.getFirstPage()
     }
     
@@ -215,7 +215,7 @@ class TimelineViewController: UIViewController {
         })
     }
     
-    func dismissPostForm() {
+    @objc func dismissPostForm() {
         UIView.animate(withDuration: 0.2,
                        delay: 0,
                        usingSpringWithDamping: 1,
@@ -312,7 +312,7 @@ extension TimelineViewController {
         navigationItem.rightBarButtonItem = rightBarButtonItem()
     }
     
-    func followUser() {
+    @objc func followUser() {
         switch type {
         case .user(let user):
             followUserManager.startFollowing(user: user, completionBlock: { _ in self.updateFollowButton() })
@@ -320,7 +320,7 @@ extension TimelineViewController {
         }
     }
     
-    func stopFollowingUser() {
+    @objc func stopFollowingUser() {
         switch type {
         case .user(let user):
             followUserManager.askToStopFollowingUser(user, presentingViewController: self, completionBlock: { _ in self.updateFollowButton() })
@@ -333,7 +333,7 @@ extension TimelineViewController {
 // MARK: - Long Tap Gesture
 
 extension TimelineViewController {
-    func longTapOnCell(_ sender: UILongPressGestureRecognizer) {
+    @objc func longTapOnCell(_ sender: UILongPressGestureRecognizer) {
         if sender.state == .began {
             let location = sender.location(in: self.timelineTableView)
             let indexPath = self.timelineTableView.indexPathForRow(at: location)
diff --git a/Emojr/UserListViewController.swift b/Emojr/UserListViewController.swift
index be76c60..dc7d63c 100644
--- a/Emojr/UserListViewController.swift
+++ b/Emojr/UserListViewController.swift
@@ -51,7 +51,7 @@ class UserListViewController: UIViewController {
     
     override func viewDidDisappear(_ animated: Bool) {
         super.viewDidDisappear(animated)
-        self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName : UIColor.white]
+        self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white]
     }
     
     func rightBarButtonItem() -> UIBarButtonItem? {
@@ -75,7 +75,7 @@ class UserListViewController: UIViewController {
         tableView.register(UINib(nibName: "UserTableViewCell", bundle:nil), forCellReuseIdentifier: UserCellIdentifier)
     }
     
-    func refreshData() {
+    @objc func refreshData() {
         refreshControl.beginRefreshing()
         
         networkFacade.getUsers(completionBlock: userResponseHandler)
@@ -104,7 +104,7 @@ class UserListViewController: UIViewController {
         }
     }
     
-    func navigateToAddBySearch() {
+    @objc func navigateToAddBySearch() {
         self.navigationController?.pushViewController(AddUsersViewController(), animated: true)
     }