diff --git a/SkeletonViewCore/Sources/API/AnimationBuilder/SkeletonAnimationBuilder.swift b/SkeletonViewCore/Sources/API/AnimationBuilder/SkeletonAnimationBuilder.swift
index 321c9b13..c7a52bd2 100644
--- a/SkeletonViewCore/Sources/API/AnimationBuilder/SkeletonAnimationBuilder.swift
+++ b/SkeletonViewCore/Sources/API/AnimationBuilder/SkeletonAnimationBuilder.swift
@@ -27,10 +27,15 @@ public class SkeletonAnimationBuilder {
             let animGroup = CAAnimationGroup()
             animGroup.animations = [startPointAnim, endPointAnim]
             animGroup.duration = duration
-            animGroup.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeIn)
             animGroup.repeatCount = .infinity
             animGroup.autoreverses = autoreverses
             animGroup.isRemovedOnCompletion = false
+
+            if #available(iOS 12.0, *) {
+                animGroup.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeIn)
+            } else {
+                animGroup.timingFunction = CAMediaTimingFunction(controlPoints: 0.42, 0.0, 1.0, 1.0)
+            }
             
             return animGroup
         }
diff --git a/SkeletonViewCore/Sources/API/UIKitExtensions/CALayer+Animations.swift b/SkeletonViewCore/Sources/API/UIKitExtensions/CALayer+Animations.swift
index 89d22194..87e518c3 100644
--- a/SkeletonViewCore/Sources/API/UIKitExtensions/CALayer+Animations.swift
+++ b/SkeletonViewCore/Sources/API/UIKitExtensions/CALayer+Animations.swift
@@ -22,10 +22,15 @@ public extension CALayer {
         // swiftlint:disable:next force_unwrapping
         pulseAnimation.toValue = UIColor(cgColor: backgroundColor!).complementaryColor.cgColor
         pulseAnimation.duration = 1
-        pulseAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
         pulseAnimation.autoreverses = true
         pulseAnimation.repeatCount = .infinity
         pulseAnimation.isRemovedOnCompletion = false
+
+        if #available(iOS 12.0, *) {
+            pulseAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
+        } else {
+            pulseAnimation.timingFunction = CAMediaTimingFunction(controlPoints: 0.42, 0.0, 0.58, 1.0)
+        }
         return pulseAnimation
     }