diff --git a/notes/envs/envs-versioned/requirements_epsdev_v1.3.0_040821.txt b/notes/envs/envs-versioned/requirements_epsdev_v1.3.0_040821.txt
index 8a71344..1d4abe7 100644
--- a/notes/envs/envs-versioned/requirements_epsdev_v1.3.0_040821.txt
+++ b/notes/envs/envs-versioned/requirements_epsdev_v1.3.0_040821.txt
@@ -99,7 +99,7 @@ statsmodels==0.12.2
 sympy==1.8
 terminado==0.9.3
 testpath==0.4.4
-tornado==6.1
+tornado==6.4.2
 tqdm==4.59.0
 traitlets==5.0.5
 transforms3d==0.3.1