diff --git a/_config.yml b/_config.yml
index 1f0dbf48..0dc9f33e 100644
--- a/_config.yml
+++ b/_config.yml
@@ -238,7 +238,7 @@ wiremock_version: 3.3.1
 wiremock_baseline: 3.x
 pageEditPrefix: https://github.com/wiremock/wiremock.org/edit/main/
 
-grpc_extension_version: 0.3.0
+grpc_extension_version: 0.4.0
 
 community_slack:
   join_url: https://slack.wiremock.org/