diff --git a/samples/server/petstore/python-fastapi/requirements.txt b/samples/server/petstore/python-fastapi/requirements.txt
index a3dcd254cc01..b853179b7279 100644
--- a/samples/server/petstore/python-fastapi/requirements.txt
+++ b/samples/server/petstore/python-fastapi/requirements.txt
@@ -13,7 +13,7 @@ graphql-core==2.3.2
 graphql-relay==2.0.1
 h11==0.12.0
 httptools==0.1.2
-idna==2.10
+idna==3.15
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==2.0.1