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--- a/README.md
+++ b/README.md
@@ -2,6 +2,9 @@
 
 A proposed [WebAssembly System Interface](https://github.com/WebAssembly/WASI) API.
 
+> [!IMPORTANT]
+> This repository has been merged into the main [WebAssembly/WASI](https://github.com/webassembly/wasi) repository and is now archived.
+
 ### Current Phase
 
 wasi-http is currently in [Phase 3](https://github.com/WebAssembly/WASI/blob/main/Proposals.md#phase-3---implementation-phase-cg--wg)