diff --git a/superfaktura/utils/__init__.py b/superfaktura/utils/__init__.py
index 4d46350..48061e1 100644
--- a/superfaktura/utils/__init__.py
+++ b/superfaktura/utils/__init__.py
@@ -1,10 +1,7 @@
-import tempfile
-from typing import IO
 
 
 def save_temporary_file_as_pdf(
-    temp_file: IO[bytes], output_path: str = "output.pdf"
+    input_data: bytes, output_path: str = "output.pdf"
 ) -> None:
     with open(output_path, "wb") as f:
-        f.write(temp_file.read())
-        temp_file.close()
+        f.write(input_data)