diff --git a/FastImage.js b/FastImage.js
index f669fcd..e7211d4 100644
--- a/FastImage.js
+++ b/FastImage.js
@@ -88,7 +88,7 @@ const FastImageSourcePropType = PropTypes.shape({
 
 FastImage.propTypes = {
   ...View.propTypes,
-  source: FastImageSourcePropType,
+  source: PropTypes.oneOfType([FastImageSourcePropType, PropTypes.number]),
   onLoadStart: PropTypes.func,
   onProgress: PropTypes.func,
   onLoad: PropTypes.func,