diff --git a/api/domain_export_download.go b/api/domain_export_download.go
index 09566c3..daacc39 100644
--- a/api/domain_export_download.go
+++ b/api/domain_export_download.go
@@ -27,6 +27,6 @@ func domainExportDownloadHandler(w http.ResponseWriter, r *http.Request) {
 		fmt.Fprintf(w, "Error: that exportHex does not exist\n")
 	}
 
-	w.Header().Set("Content-Disposition", fmt.Sprintf(`inline; filename="%s-%v.gz"`, domain, creationDate.Unix()))
+	w.Header().Set("Content-Disposition", fmt.Sprintf(`inline; filename="%s-%v.json.gz"`, domain, creationDate.Unix()))
 	w.Write(binData)
 }