diff --git a/microservices/histogram_image/requirements.txt b/microservices/histogram_image/requirements.txt
index cc65a70f..86c44e22 100644
--- a/microservices/histogram_image/requirements.txt
+++ b/microservices/histogram_image/requirements.txt
@@ -1,4 +1,4 @@
 pymongo==3.10.1
-flask==2.1.0
+flask==2.3.2
 datetime==4.3
 pytz==2020.1
\ No newline at end of file