diff --git a/worker/preparegspatialjp/command.go b/worker/preparegspatialjp/command.go
index 617edcf1d..a5a8ef3df 100644
--- a/worker/preparegspatialjp/command.go
+++ b/worker/preparegspatialjp/command.go
@@ -285,8 +285,11 @@ func notifyError(ctx context.Context, c *cms.CMS, cityItemID string, citygmlErro
 		}
 	}
 
-	var rawItem *cms.Item
-	cms.Marshal(item, rawItem)
+	var rawItem cms.Item
+	cms.Marshal(item, &rawItem)
+	if rawItem.ID == "" {
+		return fmt.Errorf("failed to marshal item")
+	}
 
 	if _, err := c.UpdateItem(ctx, rawItem.ID, rawItem.Fields, rawItem.MetadataFields); err != nil {
 		return fmt.Errorf("failed to update item: %w", err)
diff --git a/worker/preparegspatialjp/file.go b/worker/preparegspatialjp/file.go
index 8ff915ffc..d361bc8e7 100644
--- a/worker/preparegspatialjp/file.go
+++ b/worker/preparegspatialjp/file.go
@@ -61,6 +61,15 @@ func Unzip(ctx context.Context, zipFile *bytes.Reader, targetDir string, trimPat
 			return fmt.Errorf("invalid file path: %s", filePath)
 		}
 
+		if strings.HasPrefix(filePath, "__MACOSX/") ||
+			strings.HasPrefix(filePath, "/__MACOSX/") ||
+			strings.HasSuffix(filePath, "/.DS_Store") ||
+			strings.HasSuffix(filePath, "/Thumb.db") ||
+			filePath == ".DS_Store" || filePath == "Thumbs.db" {
+			log.Debugf("skipping %s...", f.Name)
+			continue
+		}
+
 		log.Infofc(ctx, "unzipping %s -> %s", f.Name, filePath)
 
 		if trimPathSuffix != "" {