diff --git a/worthless/installer.py b/worthless/installer.py
index fa86440..1493e75 100644
--- a/worthless/installer.py
+++ b/worthless/installer.py
@@ -104,7 +104,7 @@ class Installer:
         file_path = AsyncPath(self.temp_path).joinpath(file_name)
         if overwrite:
             await file_path.unlink(missing_ok=True)
-        if file_path.exists():
+        if await file_path.exists():
             cur_len = len(await file_path.read_bytes())
             params |= {
                 "Range": f"bytes={cur_len}-{file_len if file_len else ''}"