diff --git a/src/AnimatedCircularProgress.js b/src/AnimatedCircularProgress.js
index 57b4a10..1982da3 100644
--- a/src/AnimatedCircularProgress.js
+++ b/src/AnimatedCircularProgress.js
@@ -42,12 +42,12 @@ export default class AnimatedCircularProgress extends React.Component {
     ).start(onAnimationComplete);
   }
 
-  performLinearAnimation(toValue, duration) {
+  performTimingAnimation(toValue, duration, easing = Easing.linear) {
     const { onLinearAnimationComplete } = this.props;
 
     Animated.timing(this.state.chartFillAnimation, {
       toValue: toValue,
-      easing: Easing.linear,
+      easing: easing,
       duration: duration
     }).start(onLinearAnimationComplete);
   }