diff --git a/requirements-test.txt b/requirements-test.txt
index 1d4b4d2357..efff339524 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -13,3 +13,4 @@ xarray>=0.13
 wheel
 pyarrow
 zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
+fonttools>=4.61.0 # not directly required, pinned by Snyk to avoid a vulnerability