diff --git a/api/controllers/console/human_input_form.py b/api/controllers/console/human_input_form.py
index 5d79e1b5e9..845af37365 100644
--- a/api/controllers/console/human_input_form.py
+++ b/api/controllers/console/human_input_form.py
@@ -7,7 +7,8 @@ import logging
 from collections.abc import Generator
 
 from flask import Response, jsonify, request
-from flask_restx import Resource, reqparse
+from flask_restx import Resource
+from pydantic import BaseModel
 from sqlalchemy import select
 from sqlalchemy.orm import Session, sessionmaker
 
@@ -33,6 +34,11 @@ from services.workflow_event_snapshot_service import build_workflow_event_stream
 logger = logging.getLogger(__name__)
 
 
+class HumanInputFormSubmitPayload(BaseModel):
+    inputs: dict
+    action: str
+
+
 def _jsonify_form_definition(form: Form) -> Response:
     payload = form.get_definition().model_dump()
     payload["expiration_time"] = int(form.expiration_time.timestamp())
@@ -84,10 +90,7 @@ class ConsoleHumanInputFormApi(Resource):
             "action": "Approve"
         }
         """
-        parser = reqparse.RequestParser()
-        parser.add_argument("inputs", type=dict, required=True, location="json")
-        parser.add_argument("action", type=str, required=True, location="json")
-        args = parser.parse_args()
+        payload = HumanInputFormSubmitPayload.model_validate(request.get_json())
         current_user, _ = current_account_with_tenant()
 
         service = HumanInputService(db.engine)
@@ -107,8 +110,8 @@ class ConsoleHumanInputFormApi(Resource):
         service.submit_form_by_token(
             recipient_type=recipient_type,
             form_token=form_token,
-            selected_action_id=args["action"],
-            form_data=args["inputs"],
+            selected_action_id=payload.action,
+            form_data=payload.inputs,
             submission_user_id=current_user.id,
         )