diff --git a/README.md b/README.md
index fb89ed2aa8..190397a592 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,8 @@ If you have questions, you are welcome to contact us. One of the best places to
 ## Plugins
 
 > Plugins are a way to extend the functionality of AFFiNE.
+>
+> (Currently, plugins are under heavy development, and the SDK is not yet available.)
 
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 | ------------------------------------------------ | ----------------------------------------- |