diff --git a/build.sh b/build.sh
index 53f2961..51fc2ce 100755
--- a/build.sh
+++ b/build.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 
 # Copyright (c) 2019-2021 GMO GlobalSign Pte. Ltd.
-# 
+#
 # Licensed under the MIT License (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at
-# 
+#
 # https://opensource.org/licenses/MIT
-# 
+#
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Check, build, test the hvclient. 
+# Check, build, test the hvclient.
 gofumports -d ./. &&
 golint ./... &&
 go build ./... &&
diff --git a/internal/pki/pem.go b/internal/pki/pem.go
index 466c000..498cf44 100644
--- a/internal/pki/pem.go
+++ b/internal/pki/pem.go
@@ -83,7 +83,11 @@ func PrivateKeyFromFileWithPassword(filename, password string) (interface{}, err
 		return rsakey, nil
 	}
 
-	return nil, errors.New("unsupported private key type")
+	if rsakey, err := x509.ParsePKCS8PrivateKey(keybytes); err == nil {
+		return rsakey, nil
+	}
+
+	return nil, errors.New("unsupported private key type DAVE")
 }
 
 // PublicKeyFromFile reads a PEM-encoded file and returns the public key it