diff --git a/python/requirements.txt b/python/requirements.txt
index e8497c9..559ea8a 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,4 +1,4 @@
 six==1.10.0
-numpy==1.11.0
+numpy==1.21.0
 scipy==0.17.0
 python-igraph==0.7.1