diff --git a/app/apps/imports/parsers.py b/app/apps/imports/parsers.py
index 6eb22ef574367ddab9a4706901a4a6850aec4d3d..cfda3f0fe2859fdf14aad34079b0521c1c20e645 100644
--- a/app/apps/imports/parsers.py
+++ b/app/apps/imports/parsers.py
@@ -145,7 +145,7 @@ class ZipParser(ParserDocument):
                     try:
                         file_extension = os.path.splitext(zipedfh.name)[1][1:]
                         # image
-                        if file_extension in get_available_image_extensions():
+                        if file_extension.lower() in get_available_image_extensions():
                             try:
                                 part = DocumentPart.objects.filter(
                                     document=self.document,