diff --git a/PKHUD/PKHUD.swift b/PKHUD/PKHUD.swift
index c960b73..81f696b 100644
--- a/PKHUD/PKHUD.swift
+++ b/PKHUD/PKHUD.swift
@@ -55,13 +55,13 @@ open class PKHUD: NSObject {
 
     public override init () {
         super.init()
-      
+
         #if swift(>=4.2)
         let notificationName = UIApplication.willEnterForegroundNotification
         #else
         let notificationName = NSNotification.Name.UIApplicationWillEnterForeground
         #endif
-      
+
         NotificationCenter.default.addObserver(self,
             selector: #selector(PKHUD.willEnterForeground(_:)),
             name: notificationName,
@@ -194,7 +194,7 @@ open class PKHUD: NSObject {
     // MARK: Timer callbacks
 
     @objc internal func performDelayedHide(_ timer: Timer? = nil) {
-        let userInfo = timer?.userInfo as? [String:AnyObject]
+        let userInfo = timer?.userInfo as? [String: AnyObject]
         let key = userInfo?["timerActionKey"] as? String
         var completion: TimerAction?
 
diff --git a/PKHUD/PKHUDAssets.swift b/PKHUD/PKHUDAssets.swift
index f9aa00e..50bfed9 100644
--- a/PKHUD/PKHUDAssets.swift
+++ b/PKHUD/PKHUDAssets.swift
@@ -19,7 +19,7 @@ open class PKHUDAssets: NSObject {
 
     internal class func bundledImage(named name: String) -> UIImage {
         let bundle = Bundle(for: PKHUDAssets.self)
-        let image = UIImage(named: name, in:bundle, compatibleWith:nil)
+        let image = UIImage(named: name, in: bundle, compatibleWith: nil)
         if let image = image {
             return image
         }
diff --git a/PKHUD/PKHUDErrorView.swift b/PKHUD/PKHUDErrorView.swift
index 1b19915..d53bb05 100644
--- a/PKHUD/PKHUDErrorView.swift
+++ b/PKHUD/PKHUDErrorView.swift
@@ -24,7 +24,7 @@ open class PKHUDErrorView: PKHUDSquareBaseView, PKHUDAnimating {
             path.addLine(to: CGPoint(x: 88.0, y: 44.0))
             return path.cgPath
         }()
-      
+
         #if swift(>=4.2)
         dash.lineCap     = .round
         dash.lineJoin    = .round
@@ -34,7 +34,7 @@ open class PKHUDErrorView: PKHUDSquareBaseView, PKHUDAnimating {
         dash.lineJoin    = kCALineJoinRound
         dash.fillMode    = kCAFillModeForwards
         #endif
-      
+
         dash.fillColor   = nil
         dash.strokeColor = UIColor(red: 0.15, green: 0.15, blue: 0.15, alpha: 1.0).cgColor
         dash.lineWidth   = 6
@@ -60,25 +60,25 @@ open class PKHUDErrorView: PKHUDSquareBaseView, PKHUDAnimating {
     func rotationAnimation(_ angle: CGFloat) -> CABasicAnimation {
         var animation: CABasicAnimation
         if #available(iOS 9.0, *) {
-            let springAnimation = CASpringAnimation(keyPath:"transform.rotation.z")
+            let springAnimation = CASpringAnimation(keyPath: "transform.rotation.z")
             springAnimation.damping = 1.5
             springAnimation.mass = 0.22
             springAnimation.initialVelocity = 0.5
             animation = springAnimation
         } else {
-            animation = CABasicAnimation(keyPath:"transform.rotation.z")
+            animation = CABasicAnimation(keyPath: "transform.rotation.z")
         }
 
         animation.fromValue = 0.0
         animation.toValue = angle * CGFloat(.pi / 180.0)
         animation.duration = 1.0
-      
+
         #if swift(>=4.2)
         let timingFunctionName = CAMediaTimingFunctionName.easeInEaseOut
         #else
         let timingFunctionName = kCAMediaTimingFunctionEaseInEaseOut
         #endif
-      
+
         animation.timingFunction = CAMediaTimingFunction(name: timingFunctionName)
         return animation
     }
diff --git a/PKHUD/PKHUDSquareBaseView.swift b/PKHUD/PKHUDSquareBaseView.swift
index 8dbddbf..af6c2a2 100644
--- a/PKHUD/PKHUDSquareBaseView.swift
+++ b/PKHUD/PKHUDSquareBaseView.swift
@@ -74,7 +74,7 @@ open class PKHUDSquareBaseView: UIView {
         let threeQuarterHeight = CGFloat(ceilf(CFloat(viewHeight / 4.0 * 3.0)))
 
         titleLabel.frame = CGRect(origin: CGPoint.zero, size: CGSize(width: viewWidth, height: quarterHeight))
-        imageView.frame = CGRect(origin: CGPoint(x:0.0, y:quarterHeight), size: CGSize(width: viewWidth, height: halfHeight))
-        subtitleLabel.frame = CGRect(origin: CGPoint(x:0.0, y:threeQuarterHeight), size: CGSize(width: viewWidth, height: quarterHeight))
+        imageView.frame = CGRect(origin: CGPoint(x: 0.0, y: quarterHeight), size: CGSize(width: viewWidth, height: halfHeight))
+        subtitleLabel.frame = CGRect(origin: CGPoint(x: 0.0, y: threeQuarterHeight), size: CGSize(width: viewWidth, height: quarterHeight))
     }
 }
diff --git a/PKHUD/PKHUDSuccessView.swift b/PKHUD/PKHUDSuccessView.swift
index fdd1a1a..56825ec 100644
--- a/PKHUD/PKHUDSuccessView.swift
+++ b/PKHUD/PKHUDSuccessView.swift
@@ -21,7 +21,7 @@ open class PKHUDSuccessView: PKHUDSquareBaseView, PKHUDAnimating {
         let layer = CAShapeLayer()
         layer.frame = CGRect(x: 3.0, y: 3.0, width: 88.0, height: 56.0)
         layer.path = checkmarkPath.cgPath
-      
+
         #if swift(>=4.2)
         layer.fillMode    = .forwards
         layer.lineCap     = .round
@@ -31,7 +31,7 @@ open class PKHUDSuccessView: PKHUDSquareBaseView, PKHUDAnimating {
         layer.lineCap     = kCALineCapRound
         layer.lineJoin    = kCALineJoinRound
         #endif
-      
+
         layer.fillColor   = nil
         layer.strokeColor = UIColor(red: 0.15, green: 0.15, blue: 0.15, alpha: 1.0).cgColor
         layer.lineWidth   = 6.0
@@ -51,12 +51,12 @@ open class PKHUDSuccessView: PKHUDSquareBaseView, PKHUDAnimating {
     }
 
     open func startAnimation() {
-        let checkmarkStrokeAnimation = CAKeyframeAnimation(keyPath:"strokeEnd")
+        let checkmarkStrokeAnimation = CAKeyframeAnimation(keyPath: "strokeEnd")
         checkmarkStrokeAnimation.values = [0, 1]
         checkmarkStrokeAnimation.keyTimes = [0, 1]
         checkmarkStrokeAnimation.duration = 0.35
 
-        checkmarkShapeLayer.add(checkmarkStrokeAnimation, forKey:"checkmarkStrokeAnim")
+        checkmarkShapeLayer.add(checkmarkStrokeAnimation, forKey: "checkmarkStrokeAnim")
     }
 
     open func stopAnimation() {
diff --git a/PKHUD/Window.swift b/PKHUD/Window.swift
index 1baaac1..96e4432 100644
--- a/PKHUD/Window.swift
+++ b/PKHUD/Window.swift
@@ -77,7 +77,7 @@ internal class ContainerView: UIView {
 
     fileprivate let backgroundView: UIView = {
         let view = UIView()
-        view.backgroundColor = UIColor(white:0.0, alpha:0.25)
+        view.backgroundColor = UIColor(white: 0.0, alpha: 0.25)
         view.alpha = 0.0
         return view
     }()
diff --git a/PKHUDDemoUITests/PKHUDDemoUITests.swift b/PKHUDDemoUITests/PKHUDDemoUITests.swift
index 464ca01..3867be8 100644
--- a/PKHUDDemoUITests/PKHUDDemoUITests.swift
+++ b/PKHUDDemoUITests/PKHUDDemoUITests.swift
@@ -61,7 +61,7 @@ class PKHUDUITests: XCTestCase {
     }
 
     func waitForCondition(element: XCUIElement, predicate: NSPredicate, timeout: TimeInterval = 3.5) {
-        expectation(for: predicate, evaluatedWith: element, handler:nil)
+        expectation(for: predicate, evaluatedWith: element, handler: nil)
         waitForExpectations(timeout: timeout, handler: nil)
     }