diff --git a/stubs/asn1crypto/__init__.py b/stubs/asn1crypto/__init__.pyi
similarity index 100%
rename from stubs/asn1crypto/__init__.py
rename to stubs/asn1crypto/__init__.pyi
diff --git a/stubs/asn1crypto/algos.py b/stubs/asn1crypto/algos.pyi
similarity index 100%
rename from stubs/asn1crypto/algos.py
rename to stubs/asn1crypto/algos.pyi
diff --git a/stubs/asn1crypto/core.py b/stubs/asn1crypto/core.pyi
similarity index 100%
rename from stubs/asn1crypto/core.py
rename to stubs/asn1crypto/core.pyi
diff --git a/stubs/asn1crypto/csr.py b/stubs/asn1crypto/csr.pyi
similarity index 100%
rename from stubs/asn1crypto/csr.py
rename to stubs/asn1crypto/csr.pyi
diff --git a/stubs/asn1crypto/pem.py b/stubs/asn1crypto/pem.py
deleted file mode 100644
index 2871597..0000000
--- a/stubs/asn1crypto/pem.py
+++ /dev/null
@@ -1,18 +0,0 @@
-from typing import Tuple, Dict, Union, Generator, Optional, Mapping, overload
-
-Unarmor = Tuple[str, Dict[str, str], bytes]
-
-@overload
-def unarmor(pem_bytes: bytes) -> Unarmor:
-    ...
-
-@overload
-def unarmor(pem_bytes: bytes, multiple: bool) -> Generator[Unarmor, None, None]:
-    ...
-
-def unarmor(pem_bytes: bytes, multiple: bool = False) -> Union[Unarmor, Generator[Unarmor, None, None]]:
-    ...
-
-
-def armor(type_name: str, der_bytes: bytes, headers: Optional[Mapping[str, str]] = None) -> bytes:
-    ...
diff --git a/stubs/asn1crypto/pem.pyi b/stubs/asn1crypto/pem.pyi
new file mode 100644
index 0000000..29ceeb7
--- /dev/null
+++ b/stubs/asn1crypto/pem.pyi
@@ -0,0 +1,8 @@
+from collections.abc import Mapping
+from typing import Optional
+
+def unarmor(pem_bytes: bytes) -> tuple[str, dict[str, str], bytes]:
+    ...
+
+def armor(type_name: str, der_bytes: bytes, headers: Optional[Mapping[str, str]] = None) -> bytes:
+    ...
diff --git a/stubs/gmpy2/__init__.py b/stubs/gmpy2/__init__.pyi
similarity index 100%
rename from stubs/gmpy2/__init__.py
rename to stubs/gmpy2/__init__.pyi
diff --git a/stubs/pytest/__init__.py b/stubs/pytest/__init__.py
deleted file mode 100644
index 40788da..0000000
--- a/stubs/pytest/__init__.py
+++ /dev/null
@@ -1,9 +0,0 @@
-from typing import ContextManager, Optional, Type
-
-
-class ExceptionInfo:
-    ...
-
-
-def raises(exc: Type[Exception], match: Optional[str] = None) -> ContextManager[ExceptionInfo]:
-    ...