diff --git a/stubs/pyOpenSSL/OpenSSL/SSL.pyi b/stubs/pyOpenSSL/OpenSSL/SSL.pyi
index c9f284793..13b618ad3 100644
--- a/stubs/pyOpenSSL/OpenSSL/SSL.pyi
+++ b/stubs/pyOpenSSL/OpenSSL/SSL.pyi
@@ -131,7 +131,7 @@ class Connection(object):
     def get_peer_cert_chain(self) -> list[X509]: ...
     def get_alpn_proto_negotiated(self) -> bytes: ...
     def get_cipher_name(self) -> str | None: ...
-    def get_protocol_version_name(self) -> str | None: ...
+    def get_protocol_version_name(self) -> str: ...
     def get_shutdown(self) -> int: ...
     def get_app_data(self) -> Any: ...
     def set_app_data(self, data: Any) -> None: ...