diff --git a/changelog/upgrade-notes.md b/changelog/upgrade-notes.md
index d0f3830f3a..7ed9288d43 100644
--- a/changelog/upgrade-notes.md
+++ b/changelog/upgrade-notes.md
@@ -2,6 +2,10 @@
 
 ### v3.14.0
 
+#### Internet Explorer 9 support
+
+As of this release, OpenLayers requires a `requestAnimationFrame`/`cancelAnimationFrame` polyfill for IE 9 support. See http://cdn.polyfill.io/v2/docs/features/#requestAnimationFrame.
+
 #### Layer pre-/postcompose event changes
 
 It is the responsibility of the application to undo any canvas transform changes at the end of a layer 'precompose' or 'postcompose' handler. Previously, it was ok to set a null transform. The API now guarantees a device pixel coordinate system on the canvas with its origin in the top left corner of the map. However, applications should not rely on the underlying canvas being the same size as the visible viewport.
diff --git a/test/index.html b/test/index.html
index ece127f01b..52bae4e97d 100644
--- a/test/index.html
+++ b/test/index.html
@@ -15,6 +15,7 @@
   <script type="text/javascript" src="../node_modules/mocha/mocha.js"></script>
   <script type="text/javascript" src="../node_modules/proj4/dist/proj4.js"></script>
   <script type="text/javascript" src="test-extensions.js"></script>
+  <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame"></script>
   <script>
     if (typeof initMochaPhantomJS === 'function') {
       initMochaPhantomJS()
diff --git a/test_rendering/index.html b/test_rendering/index.html
index 0a97859b7f..b62179a0c1 100644
--- a/test_rendering/index.html
+++ b/test_rendering/index.html
@@ -16,6 +16,7 @@
   <script type="text/javascript" src="../node_modules/proj4/dist/proj4.js"></script>
   <script type="text/javascript" src="../node_modules/resemblejs/resemble.js"></script>
   <script type="text/javascript" src="../test/test-extensions.js"></script>
+  <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame"></script>
   <script>
     mocha.setup({
       ui: 'bdd',