diff --git a/requirements/requirements-macOS-latest-3.9.txt b/requirements/requirements-macOS-latest-3.9.txt
index 6f5fac77..aeba41ef 100644
--- a/requirements/requirements-macOS-latest-3.9.txt
+++ b/requirements/requirements-macOS-latest-3.9.txt
@@ -213,7 +213,7 @@ toposort==1.10
     # via symfit
 torch==2.0.1
     # via pyhdx (pyproject.toml)
-tornado==6.3.3
+tornado==6.4.1
     # via
     #   bokeh
     #   distributed
diff --git a/requirements/requirements-ubuntu-latest-3.9.txt b/requirements/requirements-ubuntu-latest-3.9.txt
index fc3dcf80..8db7ddbb 100644
--- a/requirements/requirements-ubuntu-latest-3.9.txt
+++ b/requirements/requirements-ubuntu-latest-3.9.txt
@@ -246,7 +246,7 @@ torch==2.0.1
     # via
     #   pyhdx (pyproject.toml)
     #   triton
-tornado==6.3.3
+tornado==6.4.1
     # via
     #   bokeh
     #   distributed
diff --git a/requirements/requirements-windows-latest-3.9.txt b/requirements/requirements-windows-latest-3.9.txt
index eea934b7..2f16841f 100644
--- a/requirements/requirements-windows-latest-3.9.txt
+++ b/requirements/requirements-windows-latest-3.9.txt
@@ -217,7 +217,7 @@ toposort==1.10
     # via symfit
 torch==2.0.1
     # via pyhdx (pyproject.toml)
-tornado==6.3.3
+tornado==6.4.1
     # via
     #   bokeh
     #   distributed