diff --git a/utils/google_app_engine/additional_requirements.txt b/utils/google_app_engine/additional_requirements.txt
index 477e643..6b9a0c2 100644
--- a/utils/google_app_engine/additional_requirements.txt
+++ b/utils/google_app_engine/additional_requirements.txt
@@ -1,4 +1,4 @@
 # add these requirements in your app on top of the existing ones
 
 Flask==2.2.5
-gunicorn==19.9.0
+gunicorn==21.2.0