diff --git a/server.hcl b/server.hcl
index 0d0c645..121a1c3 100644
--- a/server.hcl
+++ b/server.hcl
@@ -51,7 +51,7 @@ variable "UBUNTU_VERSION" {
 }
 
 variable "GRPC_HEALTH_PROBE_VERSION" {
-    default = "0.4.19"
+    default = "0.4.21"
 }
 
 variable "TAG" {