diff --git a/src/osparc_python_runner/requirements.txt b/src/osparc_python_runner/requirements.txt
index 0437431..9d09496 100644
--- a/src/osparc_python_runner/requirements.txt
+++ b/src/osparc_python_runner/requirements.txt
@@ -165,7 +165,7 @@ stack-data==0.6.3
     # via ipython
 tinycss2==1.4.0
     # via bleach
-tornado==6.5
+tornado==6.5.7
     # via jupyter-client
 traitlets==5.14.3
     # via