diff --git a/osm_fieldwork/update_form.py b/osm_fieldwork/update_form.py
index 0860755a..c896ada8 100644
--- a/osm_fieldwork/update_form.py
+++ b/osm_fieldwork/update_form.py
@@ -103,11 +103,11 @@ def update_xls_form(custom_form: BytesIO) -> BytesIO:
     # Append or overwrite the existing entities sheet
     if "entities" in mandatory_sheets:
         custom_sheets["entities"] = mandatory_sheets["entities"]
-    
+
     if "settings" in mandatory_sheets:
         custom_sheets["settings"] = mandatory_sheets["settings"]
-        current_timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
-        
+        current_timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
         # Set the 'version' column to the current timestamp (if 'version' column exists in 'settings')
         if "version" in custom_sheets["settings"].columns:
             custom_sheets["settings"].loc[:, "version"] = current_timestamp