diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 47cba371..96a75eda 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.0.0-alpha.39"
+  ".": "0.0.0-alpha.40"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e526589..464baaaa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,13 @@ contained a literal `## [X.Y.Z]` heading, release-please inserts above the first
 `##` it finds, and so the entire release landed inside the comment and rendered
 nowhere.
 
+## [0.0.0-alpha.40](https://github.com/energy-models/math-spec/compare/v0.0.0-alpha.39...v0.0.0-alpha.40) (2026-08-28)
+
+
+### Refactoring
+
+* **program:** the declaration vocabularies have one home, so a program cannot spell one differently from the file ([#219](https://github.com/energy-models/math-spec/issues/219)) ([f7596d7](https://github.com/energy-models/math-spec/commit/f7596d7bcf7ff61aff5a94807b34bf5516b29085)), closes [#209](https://github.com/energy-models/math-spec/issues/209)
+
 ## [0.0.0-alpha.39](https://github.com/energy-models/math-spec/compare/v0.0.0-alpha.38...v0.0.0-alpha.39) (2026-08-28)