diff --git a/site/config/loader.py b/site/config/loader.py
index 6d8d52d..7fdb755 100644
--- a/site/config/loader.py
+++ b/site/config/loader.py
@@ -80,7 +80,7 @@ SERVICES = _DF["SERVICES"]
 OPS_INDEX = _DF["OPS_INDEX"]
 
 DELAY = float(os.getenv("MOCK_OP_DELAY", "0.1"))
-VERSION = "0.5.7"
+VERSION = "0.5.8"
 
 
 def get_services(stand_id):
diff --git a/site/routes/openapi.py b/site/routes/openapi.py
index 309916d..a2a90c0 100644
--- a/site/routes/openapi.py
+++ b/site/routes/openapi.py
@@ -10,7 +10,9 @@ Swagger UI загружает этот JSON через /swagger и рендер
 
 import os
 
-from flask import Blueprint, jsonify
+import json
+
+from flask import Blueprint, jsonify, Response
 
 import config.loader as _cfg
 
@@ -36,11 +38,11 @@ def _build_servers():
 
 @bp.route("/openapi.json", methods=["GET"])
 def openapi_spec():
-    """GET /api/v1/svc/openapi.json — OpenAPI 3.1.0 спецификация (кешируется)."""
+    """GET /api/v1/svc/openapi.json — OpenAPI 3.1.0 спецификация (кеш в памяти)."""
     global _SPEC_CACHE
     if _SPEC_CACHE is None:
-        _SPEC_CACHE = _build_spec()
-    return jsonify(_SPEC_CACHE)
+        _SPEC_CACHE = json.dumps(_build_spec(), ensure_ascii=False)
+    return Response(_SPEC_CACHE, mimetype="application/json")
 
 
 def _build_spec():