diff --git a/requirements.txt b/requirements.txt
index d46e7ab..3a45e17 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ matplotlib>=2.0.0b4
 numpy>=1.11.2
 pandas>=0.19.1
 paramiko>=2.0.2
+pillow>=10.3.0 # not directly required, pinned by Snyk to avoid a vulnerability