diff --git a/requirements.txt b/requirements.txt
index 9dc43b1..84214c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,4 @@
 h5py==2.8.0
-numpy==1.15.2
+numpy==1.22.0
+six==1.11.0
+