diff --git a/requirements.txt b/requirements.txt
index c364534..b2cfe5d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 cycler==0.10.0
 matplotlib==1.5.1
-numpy==1.11.0
+numpy==1.21.0
 pandas==0.18.0
 pyparsing==2.1.1
 python-dateutil==2.5.3