diff --git a/requirements.txt b/requirements.txt
index 99b2409..91ca9c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ matplotlib==1.4.3
 mock==1.0.1
 networkx==1.10
 nose==1.3.4
-numpy==1.9.2
+numpy==1.21.0
 pyparsing==2.0.3
 python-dateutil==2.4.0
 python-igraph==0.7.1.post6