diff --git a/requirements.txt b/requirements.txt
index a909f58..e8d1640 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 matplotlib==1.5.1
-numpy==1.11.1
+numpy==1.21.0
 scipy==0.18.0
 seaborn==0.7.1