diff --git a/requirements.txt b/requirements.txt
index 916fe57..ef3a2c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ msgpack-python~=0.5.6
 scipy~=1.6.2
 numpy~=1.22.2
 numba~=0.53.1
-matplotlib~=3.3.3
\ No newline at end of file
+matplotlib~=3.3.3
+pillow>=10.0.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file