diff --git a/tool/prepare-release.ts b/tool/prepare-release.ts
index d5d3ba0d..efdc95a5 100644
--- a/tool/prepare-release.ts
+++ b/tool/prepare-release.ts
@@ -6,6 +6,7 @@ import {promises as fs} from 'fs';
 import * as shell from 'shelljs';
 
 import * as pkg from '../package.json';
+import {getDeprecations} from './get-deprecations';
 import {getLanguageRepo} from './get-language-repo';
 
 void (async () => {
@@ -14,6 +15,8 @@ void (async () => {
 
     await getLanguageRepo('lib/src/vendor');
 
+    await getDeprecations('lib/src/vendor');
+
     console.log('Transpiling TS into dist.');
     shell.exec('tsc -p tsconfig.build.json');
     shell.cp('lib/index.mjs', 'dist/lib/index.mjs');