diff --git a/spec/_attachments/interface-spec-changelog.md b/spec/_attachments/interface-spec-changelog.md
index aa6890b0..25494821 100644
--- a/spec/_attachments/interface-spec-changelog.md
+++ b/spec/_attachments/interface-spec-changelog.md
@@ -1,6 +1,6 @@
 ## Changelog {#changelog}
 
-### ∞ (unreleased)
+### 0.27.0 (2024-09-20) {#0_27_0}
 * EXPERIMENTAL: Management canister API to fetch Bitcoin block headers.
 * Synchronous update call API at `/api/v3/canister/.../call`.