1 files changed, 2 insertions, 1 deletions
diff --git a/setup.py b/setup.py
index 42bf2c0..d548ccd 100644
--- a/setup.py
+++ b/setup.py
@@ -98,7 +98,8 @@ if __name__ == "__main__":
         package_dir={"": "src"},
         install_requires=[
             # Fix cryptographyMinimum in tox.ini when changing this!
-            "cryptography>=38.0.0,<41",
+            # 40.0.0 and .1 are missing X509_V_* constants that we re-export.
+            "cryptography>=38.0.0,<41,!=40.0.0,!=40.0.1",
         ],
         extras_require={
             "test": ["flaky", "pretend", "pytest>=3.0.1"],