diff --git a/deploy/services/helm-charts/dss/values.example.yaml b/deploy/services/helm-charts/dss/values.example.yaml
index 52cda8dcf..1f3a25de2 100644
--- a/deploy/services/helm-charts/dss/values.example.yaml
+++ b/deploy/services/helm-charts/dss/values.example.yaml
@@ -12,6 +12,8 @@ dss:
 
 cockroachdb:
   # See https://github.com/cockroachdb/helm-charts/blob/master/cockroachdb/values.yaml
+  image:
+    tag: v21.2.7
   fullnameOverride: dss-cockroachdb
   conf:
     join: []
diff --git a/deploy/services/helm-charts/dss/values.schema.json b/deploy/services/helm-charts/dss/values.schema.json
index d9790ff03..8126f298a 100644
--- a/deploy/services/helm-charts/dss/values.schema.json
+++ b/deploy/services/helm-charts/dss/values.schema.json
@@ -12,9 +12,13 @@
               "type": "string"
             },
             "tag": {
-              "type": "string"
+              "type": "string",
+              "description": "Version tag of the CockroachDB image. Until DSS v0.16, the recommended CockroachDB version is `v21.2.7`. From DSS v0.17, the recommended CockroachDB version is `v24.1.3`."
             }
-          }
+          },
+          "required": [
+            "tag"
+          ]
         },
         "fullnameOverride": {
           "description": "Name of the internal statefulset",
diff --git a/deploy/services/helm-charts/dss/values.yaml b/deploy/services/helm-charts/dss/values.yaml
index 1b1af3a7c..f869add13 100644
--- a/deploy/services/helm-charts/dss/values.yaml
+++ b/deploy/services/helm-charts/dss/values.yaml
@@ -3,7 +3,6 @@ cockroachdb:
   # See https://github.com/cockroachdb/helm-charts/blob/master/cockroachdb/values.yaml
   image:
     repository: cockroachdb/cockroach
-    tag: v21.2.7
   tls:
     certs:
       provided: true