diff --git a/contrib/html/openapi.yaml b/contrib/html/openapi.yaml
index 18d0820e..dfe2987b 100644
--- a/contrib/html/openapi.yaml
+++ b/contrib/html/openapi.yaml
@@ -1,4 +1,4 @@
-openapi: 3.0.1
+openapi: 3.1.0
 info:
   title: ebusd-http
   description: The API that ebusd provides on HTTP port.