diff --git a/scripts/constants.js b/scripts/constants.js
index d4030e31..cbc973d6 100644
--- a/scripts/constants.js
+++ b/scripts/constants.js
@@ -45,6 +45,8 @@ export default Object.freeze({
     'v8.15',
     'v8.16',
     'v8.17',
+    'v8.18',
+    'v8.19',
     'v9.0',
     'v9.1',
     'v9.2',