diff --git a/assignment1/requirements.txt b/assignment1/requirements.txt
index f515c43..0b02b38 100644
--- a/assignment1/requirements.txt
+++ b/assignment1/requirements.txt
@@ -7,7 +7,7 @@ ipython==2.3.1
 matplotlib==1.4.2
 mock==1.0.1
 nose==1.3.4
-numpy==1.9.1
+numpy==1.21.0
 pyparsing==2.0.3
 python-dateutil==2.4.0
 pytz==2014.10