diff --git a/pack/conf/kubeadm.yaml b/pack/conf/kubeadm.yaml
index 781c6e8..2b04a65 100644
--- a/pack/conf/kubeadm.yaml
+++ b/pack/conf/kubeadm.yaml
@@ -17,7 +17,7 @@ certificateKey: 31f1e534733a1607e5ba67b2834edd3a7debba41babb1fac1bee47072a98d88b
 apiVersion: kubeadm.k8s.io/v1beta2
 kind: ClusterConfiguration
 clusterName: "kuberentes"
-kubernetesVersion: "v1.21.2"
+kubernetesVersion: "v1.21.3"
 certificatesDir: "/etc/kubernetes/pki"
 # Other components of the current control plane only connect to the apiserver on the current host.
 # This is the expected behavior, see: https://github.com/kubernetes/kubeadm/issues/2271
diff --git a/version b/version
index 0369d0b..bae5c7f 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-1.21.2
+1.21.3