diff --git a/requirements.txt b/requirements.txt
index b909486..4eea54b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ docopt==0.6.2
 ijson==2.3
 matplotlib==1.5.1
 networkx==1.11
-numpy==1.11.1
+numpy==1.21.0
 Pillow==3.3.0
 pyparsing==2.1.5
 python-dateutil==2.5.3