diff --git a/pkg/cluster/spec/cdc.go b/pkg/cluster/spec/cdc.go
index 48e4aba499..6c53bb60e3 100644
--- a/pkg/cluster/spec/cdc.go
+++ b/pkg/cluster/spec/cdc.go
@@ -37,8 +37,8 @@ type CDCSpec struct {
 	DeployDir       string                 `yaml:"deploy_dir,omitempty"`
 	LogDir          string                 `yaml:"log_dir,omitempty"`
 	Offline         bool                   `yaml:"offline,omitempty"`
-	GCTTL           int64                  `yaml:"gc-ttl,omitempty"`
-	TZ              string                 `yaml:"tz,omitempty"`
+	GCTTL           int64                  `yaml:"gc-ttl,omitempty" validate:"gc-ttl:editable"`
+	TZ              string                 `yaml:"tz,omitempty" validate:"tz:editable"`
 	NumaNode        string                 `yaml:"numa_node,omitempty" validate:"numa_node:editable"`
 	Config          map[string]interface{} `yaml:"config,omitempty" validate:"config:ignore"`
 	ResourceControl meta.ResourceControl   `yaml:"resource_control,omitempty" validate:"resource_control:editable"`