diff --git a/research/information_retrieval/doc2query/requirements.txt b/research/information_retrieval/doc2query/requirements.txt
index 3e1b519178a..9e3dc2d51de 100644
--- a/research/information_retrieval/doc2query/requirements.txt
+++ b/research/information_retrieval/doc2query/requirements.txt
@@ -121,7 +121,7 @@ tifffile==2021.6.14
 tokenizers==0.10.3
 toposort==1.6
 torch==1.8.0
-tornado==6.3.2
+tornado==6.4.1
 tqdm==4.61.1
 traitlets==5.0.5
 transformers==4.7.0