diff --git a/pkg/api/common/versions.go b/pkg/api/common/versions.go
index bc04a57f41..2d3bbc12de 100644
--- a/pkg/api/common/versions.go
+++ b/pkg/api/common/versions.go
@@ -275,7 +275,8 @@ var AllKubernetesSupportedVersions = map[string]bool{
 	"1.21.0":         false,
 	"1.21.1":         false,
 	"1.21.2":         false,
-	"1.21.3":         true,
+	"1.21.3":         false,
+	"1.21.4":         true,
 	"1.22.0-alpha.1": false,
 	"1.22.0-alpha.2": false,
 	"1.22.0-alpha.3": false,
diff --git a/vhd/packer/configure-windows-vhd.ps1 b/vhd/packer/configure-windows-vhd.ps1
index d589e5cdaf..fc7bfb5447 100644
--- a/vhd/packer/configure-windows-vhd.ps1
+++ b/vhd/packer/configure-windows-vhd.ps1
@@ -122,7 +122,7 @@ function Get-FilesToCacheOnVHD {
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.18.20/windowszip/v1.18.20-1int.zip",
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.19.14/windowszip/v1.19.14-1int.zip",
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.20.10/windowszip/v1.20.10-1int.zip",
-            "https://kubernetesartifacts.azureedge.net/kubernetes/v1.21.3/windowszip/v1.21.3-1int.zip",
+            "https://kubernetesartifacts.azureedge.net/kubernetes/v1.21.4/windowszip/v1.21.4-1int.zip",
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.22.1/windowszip/v1.22.1-1int.zip"
         );
         "c:\akse-cache\win-vnet-cni\" = @(
diff --git a/vhd/packer/install-dependencies.sh b/vhd/packer/install-dependencies.sh
index 005c7d2492..58de183a04 100644
--- a/vhd/packer/install-dependencies.sh
+++ b/vhd/packer/install-dependencies.sh
@@ -227,7 +227,7 @@ echo "  - busybox" >> ${VHD_LOGS_FILEPATH}
 
 K8S_VERSIONS="
 1.22.1
-1.21.3
+1.21.4
 1.20.10
 1.20.6-azs
 1.19.14