diff --git a/sample_project/requirements.txt b/sample_project/requirements.txt
index f4ba593..1ff9c6c 100644
--- a/sample_project/requirements.txt
+++ b/sample_project/requirements.txt
@@ -1,5 +1,5 @@
 Flask==1.0.2
-flask-restx==0.2.0
+flask-restx==0.5.1
 
 gunicorn==19.8.1