diff --git a/chart/k8gb/README.md b/chart/k8gb/README.md
index a4bafac947..80a088edd8 100644
--- a/chart/k8gb/README.md
+++ b/chart/k8gb/README.md
@@ -89,7 +89,8 @@ For Kubernetes `< 1.19` use this chart and k8gb in version `0.8.8` or lower.
 | infoblox.wapiVersion | string | `"2.3.1"` | WAPI version |
 | istio.enabled | bool | `true` | install istio RBAC |
 | k8gb.clusterGeoTag | string | `"eu"` | used for places where we need to distinguish between different Gslb instances |
-| k8gb.coredns | object | `{"extra_plugins":[]}` | Extra CoreDNS plugins to be enabled (yaml object) |
+| k8gb.coredns.extraServerBlocks | string | `""` | Extra CoreDNS server blocks |
+| k8gb.coredns.extra_plugins | list | `[]` | Extra CoreDNS plugins to be enabled |
 | k8gb.deployCrds | bool | `true` | whether it should also deploy the gslb and dnsendpoints CRDs |
 | k8gb.deployRbac | bool | `true` | whether it should also deploy the service account, cluster role and cluster role binding |
 | k8gb.dnsZone | string | `"cloud.example.com"` | dnsZone controlled by gslb |
diff --git a/chart/k8gb/templates/coredns-cm.yaml b/chart/k8gb/templates/coredns-cm.yaml
index 6b087ba0dd..b1ffcc6caa 100644
--- a/chart/k8gb/templates/coredns-cm.yaml
+++ b/chart/k8gb/templates/coredns-cm.yaml
@@ -24,4 +24,7 @@ data:
             loadbalance weight
         }
     }
+    {{- with .Values.k8gb.coredns.extraServerBlocks -}}
+    {{- tpl . $ | nindent 4 }}
+    {{- end }}
 {{- end }}
diff --git a/chart/k8gb/values.schema.json b/chart/k8gb/values.schema.json
index c285ffa141..8eec0b7954 100644
--- a/chart/k8gb/values.schema.json
+++ b/chart/k8gb/values.schema.json
@@ -369,6 +369,9 @@
                         "array",
                         "null"
                     ]
+                },
+                "extraServerBlocks": {
+                    "type": "string"
                 }
             },
             "title": "k8gbCoredns"
diff --git a/chart/k8gb/values.yaml b/chart/k8gb/values.yaml
index 90c3818029..6b9d6310d7 100644
--- a/chart/k8gb/values.yaml
+++ b/chart/k8gb/values.yaml
@@ -29,8 +29,10 @@ k8gb:
   extGslbClustersGeoTags: "us"
   # -- Reconcile time in seconds
   reconcileRequeueSeconds: 30
-  # -- Extra CoreDNS plugins to be enabled (yaml object)
   coredns:
+    # -- Extra CoreDNS server blocks
+    extraServerBlocks: ""
+    # -- Extra CoreDNS plugins to be enabled
     extra_plugins: []
   log:
     # -- log format (simple,json)