diff --git a/experiments/invariant-risk-minimization/notebooks/requirements.txt b/experiments/invariant-risk-minimization/notebooks/requirements.txt
index 84de8fd..79b1012 100644
--- a/experiments/invariant-risk-minimization/notebooks/requirements.txt
+++ b/experiments/invariant-risk-minimization/notebooks/requirements.txt
@@ -25,7 +25,7 @@ mistune==0.8.4
 nbconvert==5.6.1
 nbformat==5.0.4
 notebook==6.0.3
-numpy==1.18.1
+numpy==1.22.0
 pandas==1.0.1
 pandocfilters==1.4.2
 parso==0.6.1