diff --git a/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache b/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache
index 85e27b4a7caf..d8e19d7ac0f3 100644
--- a/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache
+++ b/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache
@@ -18,7 +18,7 @@ idna==2.10
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==2.0.1
-orjson==3.5.2
+orjson==3.9.15
 promise==2.3
 pydantic>=2
 python-dotenv==0.17.1
diff --git a/samples/server/petstore/python-fastapi/requirements.txt b/samples/server/petstore/python-fastapi/requirements.txt
index 85e27b4a7caf..d8e19d7ac0f3 100644
--- a/samples/server/petstore/python-fastapi/requirements.txt
+++ b/samples/server/petstore/python-fastapi/requirements.txt
@@ -18,7 +18,7 @@ idna==2.10
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==2.0.1
-orjson==3.5.2
+orjson==3.9.15
 promise==2.3
 pydantic>=2
 python-dotenv==0.17.1