diff --git a/Python/Flask/FlaskIntroduction/requirements.txt b/Python/Flask/FlaskIntroduction/requirements.txt
index 30ee4285c8..5050ad688f 100644
--- a/Python/Flask/FlaskIntroduction/requirements.txt
+++ b/Python/Flask/FlaskIntroduction/requirements.txt
@@ -352,7 +352,7 @@ nodeenv==1.3.5
 nose==1.3.7
 notebook==6.0.3
 numba==0.49.1
-numpy==1.18.4
+numpy==1.21.0
 o2-google-spreadsheet==0.4
 oauth2client==4.1.3
 oauthkit-google==0.1.2