diff --git a/server/app/main.py b/server/app/main.py
index 715fa631..c8d60aff 100644
--- a/server/app/main.py
+++ b/server/app/main.py
@@ -29,13 +29,13 @@
             continue
         print(f"Loading {file}")
 
-        if file.suffix == ".json":
+        if file.suffix.lower() == ".json":
             with open(file) as f:
                 adapter.json.read_aas_json_file_into(object_store, f)
-        elif file.suffix == ".xml":
+        elif file.suffix.lower() == ".xml":
             with open(file) as f:
                 adapter.xml.read_aas_xml_file_into(object_store, file)
-        elif file.suffix == ".aasx":
+        elif file.suffix.lower() == ".aasx":
             with aasx.AASXReader(file) as reader:
                 reader.read_into(object_store=object_store, file_store=file_store)
 
@@ -44,3 +44,6 @@
 else:
     print(f"STORAGE_TYPE must be either LOCAL_FILE or LOCAL_FILE_READ_ONLY! Current value: {storage_type}",
           file=sys.stderr)
+
+# Lower the suffix
+# Lower the suffixes to also match the filenames with uppercase suffixes
\ No newline at end of file