diff --git a/src/crypto_rsa.rs b/src/crypto_rsa.rs
index 9c684f3..fdd5620 100644
--- a/src/crypto_rsa.rs
+++ b/src/crypto_rsa.rs
@@ -91,7 +91,7 @@ qaCoQsuRtnowGKzrbVdinukd1wj0LkBuz2oNMB3qsXyq7QtOxiFTuKkMOoQNUiCE
 KQIDAQAB
 -----END PUBLIC KEY-----";
     let public_key = parse_spki(public_key_pem).unwrap();
-    let private_key_der = pem_to_der_bytes(&private_key_pem).unwrap();
+    let private_key_der = util::parse_pem(&private_key_pem).unwrap();
     let private_key_info = PrivateKeyInfo::from_der(&private_key_der).unwrap();
     let private_key = RsaPrivateKey::try_from(private_key_info).unwrap();
     let mut rng = rand::thread_rng();