1 files changed, 1 insertions, 1 deletions

diff --git a/libmat2/exiftool.py b/libmat2/exiftool.py
index 23d0d89..9611a04 100644
--- a/libmat2/exiftool.py
+++ b/libmat2/exiftool.py
@@ -24,7 +24,7 @@ class ExiftoolParser(abstract.AbstractParser):
             meta.pop(key, None)
         return meta
 
-    def _lightweight_cleanup(self):
+    def _lightweight_cleanup(self) -> bool:
         if os.path.exists(self.output_filename):
             try:
                 # exiftool can't force output to existing files