diff --git a/README.md b/README.md
index da3db48e..6680a4c7 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
+> [!IMPORTANT]  
+> We're actively working on a new alpha version that migrates from `node-fetch` to builtin fetch.
+> 
+> Please try it out and let us know if you run into any issues!
+> https://github.com/anthropics/anthropic-sdk-typescript/issues/645
+
 # Anthropic TypeScript API Library
 
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