diff --git a/HorizontalPicker/Classes/CollectionView/HPCollectionVC.swift b/HorizontalPicker/Classes/CollectionView/HPCollectionVC.swift
index 7f88e04..45cc155 100644
--- a/HorizontalPicker/Classes/CollectionView/HPCollectionVC.swift
+++ b/HorizontalPicker/Classes/CollectionView/HPCollectionVC.swift
@@ -93,7 +93,7 @@ class HPCollectionVC: UICollectionViewController, UICollectionViewDelegateFlowLa
     // MARK: - Helper
     
     func sizeForText(_ text: String, maxSize: CGSize) -> CGSize {
-        let attr: [NSAttributedStringKey: Any] = [.font : font]
+        let attr: [NSAttributedString.Key: Any] = [.font : font]
         var frame = (text as NSString).boundingRect(with: maxSize, options: .usesLineFragmentOrigin, attributes: attr, context: NSStringDrawingContext())
         frame = frame.integral
         frame.size.width += 10
diff --git a/HorizontalPicker/Classes/HorizontalPickerView.swift b/HorizontalPicker/Classes/HorizontalPickerView.swift
index 89f8337..cd910e7 100644
--- a/HorizontalPicker/Classes/HorizontalPickerView.swift
+++ b/HorizontalPicker/Classes/HorizontalPickerView.swift
@@ -141,7 +141,7 @@ public class HorizontalPickerView: UIView {
     private func adjust(with delegate: HorizontalPickerViewDelegate?, dataSource: HorizontalPickerViewDataSource?) {
         guard let delegate = delegate, let dataSource = dataSource, isInitialized == false else { return }
 
-        collectionController.font = delegate.textFontForHorizontalPickerView?(pickerView: self) ?? UIFont.preferredFont(forTextStyle: UIFontTextStyle.body)
+        collectionController.font = delegate.textFontForHorizontalPickerView?(pickerView: self) ?? UIFont.preferredFont(forTextStyle: UIFont.TextStyle.body)
         collectionController.textColor = delegate.textColorForHorizontalPickerView?(pickerView: self) ?? UIColor.lightGray
         collectionController.useTwoLineMode = delegate.useTwoLineModeForHorizontalPickerView?(pickerView: self) ?? false
 
diff --git a/HorizontalPickerDemo.xcodeproj/project.pbxproj b/HorizontalPickerDemo.xcodeproj/project.pbxproj
index 543414b..2d3d642 100644
--- a/HorizontalPickerDemo.xcodeproj/project.pbxproj
+++ b/HorizontalPickerDemo.xcodeproj/project.pbxproj
@@ -402,6 +402,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);
@@ -671,6 +672,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -684,6 +686,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -695,6 +698,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerDemoTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HorizontalPickerDemo.app/HorizontalPickerDemo";
 			};
 			name = Debug;
@@ -707,6 +711,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerDemoTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HorizontalPickerDemo.app/HorizontalPickerDemo";
 			};
 			name = Release;
@@ -718,6 +723,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerDemoUITests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 				TEST_TARGET_NAME = HorizontalPickerDemo;
 				USES_XCTRUNNER = YES;
 			};
@@ -730,6 +736,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerDemoUITests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 				TEST_TARGET_NAME = HorizontalPickerDemo;
 				USES_XCTRUNNER = YES;
 			};
@@ -755,6 +762,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -779,6 +787,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPicker;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -792,6 +801,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HorizontalPickerDemo.app/HorizontalPickerDemo";
 			};
 			name = Debug;
@@ -803,6 +813,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = de.berndrabe.HorizontalPickerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HorizontalPickerDemo.app/HorizontalPickerDemo";
 			};
 			name = Release;