diff --git a/pkg/common/loader.go b/pkg/common/loader.go
index 1276f9a7..4b2e58e8 100644
--- a/pkg/common/loader.go
+++ b/pkg/common/loader.go
@@ -77,7 +77,7 @@ func (d *DefaultLoader) Load() (*kubekeyapiv1alpha2.Cluster, error) {
 	}
 
 	allInOne := kubekeyapiv1alpha2.Cluster{}
-	if output, err := exec.Command("/bin/sh", "-c", "if [ ! -f \"$HOME/.ssh/id_rsa\" ]; then ssh-keygen -t rsa -P \"\" -f $HOME/.ssh/id_rsa && ls $HOME/.ssh;fi;").CombinedOutput(); err != nil {
+	if output, err := exec.Command("/bin/sh", "-c", "if [ ! -f \"$HOME/.ssh/id_rsa\" ]; then ssh-keygen -t rsa-sha2-512 -P \"\" -f $HOME/.ssh/id_rsa && ls $HOME/.ssh;fi;").CombinedOutput(); err != nil {
 		return nil, errors.New(fmt.Sprintf("Failed to generate public key: %v\n%s", err, string(output)))
 	}
 	if output, err := exec.Command("/bin/sh", "-c", "echo \"\n$(cat $HOME/.ssh/id_rsa.pub)\" >> $HOME/.ssh/authorized_keys && awk ' !x[$0]++{print > \"'$HOME'/.ssh/authorized_keys\"}' $HOME/.ssh/authorized_keys").CombinedOutput(); err != nil {
diff --git a/pkg/common/local_runtime.go b/pkg/common/local_runtime.go
index 9f11c99e..dd7cd677 100644
--- a/pkg/common/local_runtime.go
+++ b/pkg/common/local_runtime.go
@@ -41,7 +41,7 @@ func NewLocalRuntime(debug, ingoreErr bool) (LocalRuntime, error) {
 		return localRuntime, fmt.Errorf("current user is %s. Please use root", u.Username)
 	}
 
-	if output, err := exec.Command("/bin/sh", "-c", "if [ ! -f \"$HOME/.ssh/id_rsa\" ]; then ssh-keygen -t rsa -P \"\" -f $HOME/.ssh/id_rsa && ls $HOME/.ssh;fi;").CombinedOutput(); err != nil {
+	if output, err := exec.Command("/bin/sh", "-c", "if [ ! -f \"$HOME/.ssh/id_rsa\" ]; then ssh-keygen -t rsa-sha2-512 -P \"\" -f $HOME/.ssh/id_rsa && ls $HOME/.ssh;fi;").CombinedOutput(); err != nil {
 		return localRuntime, errors.New(fmt.Sprintf("Failed to generate public key: %v\n%s", err, string(output)))
 	}
 	if output, err := exec.Command("/bin/sh", "-c", "echo \"\n$(cat $HOME/.ssh/id_rsa.pub)\" >> $HOME/.ssh/authorized_keys && awk ' !x[$0]++{print > \"'$HOME'/.ssh/authorized_keys\"}' $HOME/.ssh/authorized_keys").CombinedOutput(); err != nil {