diff --git a/docs/reference/reference/backend_api/openapi.json b/docs/reference/reference/backend_api/openapi.json
index 06200605f2..c42bba4a0e 100644
--- a/docs/reference/reference/backend_api/openapi.json
+++ b/docs/reference/reference/backend_api/openapi.json
@@ -1,5 +1,5 @@
 {
-    "openapi": "3.0.2",
+    "openapi": "3.1.0",
     "info": {
         "title": "FastAPI",
         "version": "0.1.0"