diff --git a/docs/references/references.md b/docs/references/references.md
index 38f004492..70daa6c55 100644
--- a/docs/references/references.md
+++ b/docs/references/references.md
@@ -1,3 +1,3 @@
 You can find references to some other related information here. Please check below links:
 
-[WPE-API-Thunder](https://github.com/WebPlatformForEmbedded/Documentation/blob/master/Thunder/WPE-API-Thunder/WPE-API-Thunder.pdf)
+[WPE-API-Thunder](https://github.com/WebPlatformForEmbedded/Documentation/blob/master/Thunder/WPE-API-Thunder/WPE-API-Thunder.pdf) (Deprecated Early Thunder Documentation)