diff --git a/src/index.jsx b/src/index.jsx
index da05722..5588408 100644
--- a/src/index.jsx
+++ b/src/index.jsx
@@ -11,8 +11,8 @@ class CircularProgressbar extends React.Component {
 
   componentDidMount() {
     if (this.props.initialAnimation) {
-      setTimeout(() => {
-        window.requestAnimationFrame(() => {
+      this.initialTimeout = setTimeout(() => {
+        this.requestAnimationFrame = window.requestAnimationFrame(() => {
           this.setState({
             percentage: this.props.percentage,
           });
@@ -27,6 +27,11 @@ class CircularProgressbar extends React.Component {
     });
   }
 
+  componentWillUnmount() {
+    clearTimeout(this.initialTimeout);
+    window.cancelAnimationFrame(this.requestAnimationFrame);
+  }
+
   render() {
     const radius = (50 - this.props.strokeWidth / 2);
     const pathDescription = `