diff --git a/README.md b/README.md
index 664f8b3..72a87ae 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ solstone-linux status
 
 ## Protocol contract
 
-The `observer-client` contract is owned by the journal and frozen here as a byte-exact, language-neutral bundle at `vendor/observer-client-contract/`. This app adopts bundle version 1.0.2 and verifies it offline with `make check-observer-contract`.
+The `observer-client` contract is owned by the journal and frozen here as a byte-exact, language-neutral bundle at `vendor/observer-client-contract/`. This app adopts bundle version 8.0.0 and verifies it offline with `make check-observer-contract`.
 
 The bundle version, the solstone-linux application release, and wire-protocol version 2 are independent versions. When the app and authority disagree, resolve the incompatibility at the journal authority first; do not rewrite the vendored contract or weaken consumer conformance.