diff --git a/online-inference/custom-pytorch-aitextgen/custom-predictor/requirements.txt b/online-inference/custom-pytorch-aitextgen/custom-predictor/requirements.txt
index 11e97961..2080baae 100644
--- a/online-inference/custom-pytorch-aitextgen/custom-predictor/requirements.txt
+++ b/online-inference/custom-pytorch-aitextgen/custom-predictor/requirements.txt
@@ -2,3 +2,4 @@ kfserving==0.5.1
 aitextgen
 tensorflow
 
+tornado>=6.4.2 # not directly required, pinned by Snyk to avoid a vulnerability