diff --git a/Python/Flask/FlaskIntroduction/requirements.txt b/Python/Flask/FlaskIntroduction/requirements.txt
index 30ee4285c8..d9938889fe 100644
--- a/Python/Flask/FlaskIntroduction/requirements.txt
+++ b/Python/Flask/FlaskIntroduction/requirements.txt
@@ -406,7 +406,7 @@ progressbar-latest==2.4
 prometheus-client==0.7.1
 prompt-toolkit==1.0.18
 prompter @ git+git://github.com/tylerdave/prompter@b6a72f4d02cd68c6d9a2bbe00bfc5bf62b25feda
-protobuf==3.11.3
+protobuf==3.15.0
 psutil==5.7.0
 psycopg2==2.8.5
 ptyprocess==0.6.0