diff --git a/dllhook/hooker.py b/dllhook/hooker.py
index 917b8da..8b94dfd 100644
--- a/dllhook/hooker.py
+++ b/dllhook/hooker.py
@@ -8,7 +8,6 @@ import re
 import struct
 import time
 import types
-from typing import Union
 
 import capstone
 import cffi
@@ -138,8 +137,8 @@ def hook_dll(module_name, target_export_name_or_offset, timeout_seconds=5):
             install_jump(decorator_scope_vars['target_address'], decorator_scope_vars['invoker_address'])
 
         # make c wrapper for callbacker
-        argspec = inspect.getargspec(callback)
-        if argspec.varargs is not None or argspec.keywords is not None:
+        argspec = inspect.getfullargspec(callback)
+        if argspec.varargs is not None or argspec.varkw is not None:
             raise ValueError("Varargs are not allowed in 'callback'")
 
         callbacker_c_wrapper = ctypes.CFUNCTYPE(None, *[ctypes.c_uint32] * len(argspec.args))
diff --git a/dllhook/main.py b/dllhook/main.py
index dc4229d..3d23523 100644
--- a/dllhook/main.py
+++ b/dllhook/main.py
@@ -43,7 +43,7 @@ def main():
 
     if os.path.basename(INTERPRETER_DIR).lower() == 'scripts':
         # in venv
-        library_path = INTERPRETER_DIR / 'lib' / 'site-packages'
+        library_path = INTERPRETER_DIR.parent / 'lib' / 'site-packages'
         venv_setup = f'import sys\nsys.path.append(' \
                      f'{library_path.absolute().as_posix()!r})'
         with open(INTERPRETER_DIR.parent / 'pyvenv.cfg') as f: