diff --git a/requirements-test.txt b/requirements-test.txt
index 4bf98797cf..08822b0b13 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -11,3 +11,6 @@ seaborn
 xarray>=0.13
 wheel
 pyarrow
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability
+numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability