diff --git a/RELEASE.md b/RELEASE.md
index 50138d4a..1574287a 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,6 +1,6 @@
 # Release Note 🍻
 
-EMQX Operator 2.2.26-rc.1 has been released.
+EMQX Operator 2.2.26-rc.2 has been released.
 
 ## Supported version
 + apps.emqx.io/v2beta1
@@ -15,6 +15,10 @@ EMQX Operator 2.2.26-rc.1 has been released.
 
 ## Enhancements 🚀
 
++ `apps.emqx.io/v2beta1 EMQX`.
+
+  + Users can now configure the Pod Disruption Budget (PDB) for the EMQX cluster by setting `minAvailable` or `maxUnavailable` in `spec.coreTemplate.spec` or `spec.replicantTemplate.spec` within the EMQX CRD. The default setting is {"minAvailable": 1}.
+
 + EMQX operator can now be deployed in a single namespace scope, where it will only manage resources within that namespace. Just set `singleNamespace: true` in the `values.yaml` file of Helm chart, and then the operator will only manage resources in the namespace where it is deployed.
 
 ## How to install/upgrade EMQX Operator 💡
@@ -27,7 +31,7 @@ helm repo update
 helm upgrade --install emqx-operator emqx/emqx-operator \
   --namespace emqx-operator-system \
   --create-namespace \
-  --version 2.2.26-rc.1
+  --version 2.2.26-rc.2
 kubectl wait --for=condition=Ready pods -l "control-plane=controller-manager" -n emqx-operator-system
 ```