diff --git a/src/cl_sii/libs/crypto_utils.py b/src/cl_sii/libs/crypto_utils.py
index a82d4dd3..776cd8a4 100644
--- a/src/cl_sii/libs/crypto_utils.py
+++ b/src/cl_sii/libs/crypto_utils.py
@@ -46,9 +46,9 @@
 import base64
 from typing import Union
 
+import cryptography.hazmat.backends.openssl.backend as _crypto_x509_backend
 import cryptography.x509
 import signxml.util
-from cryptography.hazmat.backends.openssl import backend as _crypto_x509_backend
 from cryptography.x509 import Certificate as X509Cert
 from OpenSSL.crypto import X509 as _X509CertOpenSsl
 
diff --git a/src/cl_sii/rut/crypto_utils.py b/src/cl_sii/rut/crypto_utils.py
index d8f03c8a..df98a9c7 100644
--- a/src/cl_sii/rut/crypto_utils.py
+++ b/src/cl_sii/rut/crypto_utils.py
@@ -2,9 +2,9 @@
 from typing import Optional
 
 import cryptography
+import cryptography.hazmat.backends.openssl.backend as crypto_x509_backend
+import cryptography.hazmat.primitives.serialization.pkcs12
 import cryptography.x509
-from cryptography.hazmat.backends.openssl import backend as crypto_x509_backend
-from cryptography.hazmat.primitives.serialization import pkcs12
 
 from . import Rut, constants
 
@@ -22,7 +22,7 @@ def get_subject_rut_from_certificate_pfx(pfx_file_bytes: bytes, password: Option
         private_key,
         x509_cert,
         additional_certs,
-    ) = pkcs12.load_key_and_certificates(
+    ) = cryptography.hazmat.primitives.serialization.pkcs12.load_key_and_certificates(
         data=pfx_file_bytes,
         password=password.encode() if password is not None else None,
         backend=crypto_x509_backend,
diff --git a/src/tests/test_rut_crypto_utils.py b/src/tests/test_rut_crypto_utils.py
index 810894cc..c485d53b 100644
--- a/src/tests/test_rut_crypto_utils.py
+++ b/src/tests/test_rut_crypto_utils.py
@@ -1,8 +1,8 @@
 import unittest
 from unittest.mock import Mock, patch
 
+import cryptography.hazmat.primitives.serialization.pkcs12
 import cryptography.x509
-from cryptography.hazmat.primitives.serialization import pkcs12
 
 from cl_sii import rut
 from cl_sii.libs.crypto_utils import load_der_x509_cert
@@ -19,7 +19,7 @@ def test_get_subject_rut_from_certificate_pfx_ok(self) -> None:
         x509_cert = load_der_x509_cert(cert_der_bytes)
 
         with patch.object(
-            pkcs12,
+            cryptography.hazmat.primitives.serialization.pkcs12,
             'load_key_and_certificates',
             Mock(return_value=(None, x509_cert, None)),
         ):
@@ -40,7 +40,7 @@ def test_get_subject_rut_from_certificate_pfx_fails_if_rut_info_is_missing(self)
         x509_cert = load_der_x509_cert(cert_der_bytes)
 
         with patch.object(
-            pkcs12,
+            cryptography.hazmat.primitives.serialization.pkcs12,
             'load_key_and_certificates',
             Mock(return_value=(None, x509_cert, None)),
         ):
@@ -81,7 +81,7 @@ def test_get_subject_rut_from_certificate_pfx_does_not_throw_attribute_error_if_
         )
 
         with patch.object(
-            pkcs12,
+            cryptography.hazmat.primitives.serialization.pkcs12,
             'load_key_and_certificates',
             Mock(return_value=(None, x509_cert, None)),
         ), patch.object(