diff --git a/requirements.txt b/requirements.txt
index 6dfec89..f7197d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # install with 'pip install -r requirements.txt'
 trio==0.13.0
 setuptools==46.0.0
-numpy==1.18.1
+numpy==1.22.0
 matplotlib==3.1.3
 imageio==2.8.0
 scipy==1.4.1