diff --git a/pyencrypt/loader.py b/pyencrypt/loader.py
index 14c3ff9..842531c 100644
--- a/pyencrypt/loader.py
+++ b/pyencrypt/loader.py
@@ -26,7 +26,7 @@ def __init__(self, path) -> None:
         self.__private_key = ''
         self.__cipher_key = ''
 
-    def get_filename(self, fullname: str) -> _Path:
+    def get_filename(self, fullname: str) -> str:
         return self.path
 
     def get_data(self, path: _Path) -> bytes:
@@ -51,7 +51,8 @@ def find_spec(self,
             else:
                 file_path = Path(path[0]) / f'{fullname.rsplit(".",1)[-1]}.pye'
         else:
-            file_path = f'{fullname}.pye'
+            file_path = Path(f'{fullname}.pye')
+        file_path = file_path.absolute().as_posix()
         if not os.path.exists(file_path):
             return None
         loader = EncryptFileLoader(file_path)
diff --git a/pyencrypt/setup.py b/pyencrypt/setup.py
index 6b80895..32bfcb1 100644
--- a/pyencrypt/setup.py
+++ b/pyencrypt/setup.py
@@ -1,8 +1,8 @@
 import os
 from pathlib import Path
 
-from Cython.Build import cythonize
 from setuptools import setup
+from Cython.Build import cythonize
 
 path = Path(os.getcwd()) / 'encrypted' / 'loader.py'
 setup(ext_modules=cythonize(path.as_posix()), )