diff --git a/requirements-dev.txt b/requirements-dev.txt
index 08633e24..3e56dc63 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -26,7 +26,7 @@ click==8.0.3
     # via black
 coverage==7.1.0
     # via -r requirements-dev.in
-cryptography==39.0.2
+cryptography==41.0.2
     # via
     #   -c requirements.txt
     #   secretstorage
diff --git a/requirements.in b/requirements.in
index bc2620f4..7a83292b 100644
--- a/requirements.in
+++ b/requirements.in
@@ -5,7 +5,7 @@
 # Note: To install a package from a Git VCS repository, see the following example:
 #   git+https://github.com/example/example.git@example-vcs-ref#egg=example-pkg[foo,bar]==1.42.3
 
-cryptography==39.0.2
+cryptography==41.0.2
 defusedxml==0.7.1
 Django>=2.2.24
 djangorestframework>=3.10.3,<3.15
diff --git a/requirements.txt b/requirements.txt
index dde0fe74..e12a9350 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ certifi==2022.6.15
     # via signxml
 cffi==1.15.1
     # via cryptography
-cryptography==39.0.2
+cryptography==41.0.2
     # via
     #   -r requirements.in
     #   pyopenssl
diff --git a/tests/test_libs_crypto_utils.py b/tests/test_libs_crypto_utils.py
index bb24b423..853332c0 100644
--- a/tests/test_libs_crypto_utils.py
+++ b/tests/test_libs_crypto_utils.py
@@ -488,7 +488,7 @@ def test_load_der_x509_cert_ok_cert_real_dte_1(self) -> None:
         some_microsoft_extension_oid = oid.ObjectIdentifier("1.3.6.1.4.1.311.21.7")
         some_microsoft_ext = cert_extensions.get_extension_for_oid(some_microsoft_extension_oid)
         self.assertEqual(some_microsoft_ext.critical, False)
-        self.assertTrue(isinstance(some_microsoft_ext.value.value, bytes))
+        self.assertTrue(isinstance(some_microsoft_ext.value.public_bytes(), bytes))
 
     def test_load_der_x509_cert_ok_cert_real_dte_3(self) -> None:
         cert_der_bytes = utils.read_test_file_bytes(