diff --git a/requirements.txt b/requirements.txt
index 3308d63..103a488 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 tqdm==4.28.1
-numpy==1.16.3
+numpy==1.22.0
 pandas==0.23.4
 matplotlib==2.2.2
 prefixspan==0.5.2