diff --git a/mqtt2prom/run b/mqtt2prom/run
index d07a798..797d89c 100755
--- a/mqtt2prom/run
+++ b/mqtt2prom/run
@@ -274,7 +274,7 @@ function output(): void
         $prom .= $entry["name"] . $labels . " " . $entry["value"] . "\n";
     }
     file_put_contents("/www/metrics/new.prom", $prom);
-    file_put_contents("/www/metrics/json", $json);
+    file_put_contents("/www/metrics/json", json_encode($json,JSON_PRETTY_PRINT+JSON_UNESCAPED_SLASHES+JSON_UNESCAPED_UNICODE));
     rename("/www/metrics/new.prom", "/www/metrics/index.prom");
     // return $prom;
 }