diff --git a/docs/samples/explanation/alibi/income/requirements.txt b/docs/samples/explanation/alibi/income/requirements.txt
index c6a0facebac..d563930b45c 100644
--- a/docs/samples/explanation/alibi/income/requirements.txt
+++ b/docs/samples/explanation/alibi/income/requirements.txt
@@ -2,3 +2,4 @@ alibi>=0.9.1
 scikit-learn>=1.0.0
 dill>=0.3.0
 plotly>=4.2.1
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability