diff --git a/requirements.txt b/requirements.txt
index ba721bd..9a7fe4e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ Jinja2==2.9.6
 lockfile==0.12.2
 MarkupSafe==1.0
 ndg-httpsclient==0.4.0
-numpy==1.11.0
+numpy==1.21.0
 pyasn1==0.1.9
 pymessenger==0.0.7.0
 pyOpenSSL==0.15.1