diff --git a/pscheck/pscheck.py b/pscheck/pscheck.py
index 751883b..8c48ecd 100644
--- a/pscheck/pscheck.py
+++ b/pscheck/pscheck.py
@@ -4,6 +4,7 @@ import argparse
 import base64
 import cbor2
 from cryptography import x509
+from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.asymmetric import ec
 from cryptography.hazmat.primitives.asymmetric.utils import \
         encode_dss_signature
@@ -78,7 +79,8 @@ def analyse_qrcode(qrcode: str, additional_info: bool = False,
         with open(os.path.join(base_dir, 'certs', f"{cert_name}.pem")) as f:
             cert_asc = f.read()
 
-        cert = x509.load_pem_x509_certificate(cert_asc.encode())
+        cert = x509.load_pem_x509_certificate(cert_asc.encode(),
+                                              default_backend())
 
         public_key = cert.public_key()