diff --git a/HEAL-notebooks/jcoin/requirements.txt b/HEAL-notebooks/jcoin/requirements.txt
index 461b9403..8c31388a 100644
--- a/HEAL-notebooks/jcoin/requirements.txt
+++ b/HEAL-notebooks/jcoin/requirements.txt
@@ -2,3 +2,4 @@ pandas==1.3.0
 pyreadstat==1.1.0
 matplotlib==3.4.1
 seaborn==0.11.1
+pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability