diff --git a/javascript/fastify/config.yaml b/javascript/fastify/config.yaml
index 595718e0770..e8b46cebc23 100644
--- a/javascript/fastify/config.yaml
+++ b/javascript/fastify/config.yaml
@@ -1,3 +1,3 @@
 framework:
   website: fastify.io
-  version: '4.20'
+  version: 4.21