diff --git a/requirements.txt b/requirements.txt
index fa16cb3..085bfc9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 fastcluster==1.1.26
-numpy==1.16.6
+numpy==1.22.0
 rpy2==2.8.6
 scipy==0.17.1
 singledispatch==3.4.0.3