diff --git a/optimizely.php b/optimizely.php
index c15b42f..6a1e9ec 100644
--- a/optimizely.php
+++ b/optimizely.php
@@ -98,7 +98,7 @@ function optimizely_add_script() {
  * @return string
  */
 function optimizely_generate_script( $project_id ) {
-	return '<script src="//cdn.optimizely.com/js/' . abs( floatval( $project_id ) ) . '.js"></script>';
+	return '<script data-cfasync="false" src="//cdn.optimizely.com/js/' . abs( floatval( $project_id ) ) . '.js"></script>';
 }
 
 /**