diff --git a/src/osparc_python_runner/requirements.txt b/src/osparc_python_runner/requirements.txt
index 0437431..e30ba13 100644
--- a/src/osparc_python_runner/requirements.txt
+++ b/src/osparc_python_runner/requirements.txt
@@ -14,7 +14,7 @@ backcall==0.2.0
     # via ipython
 beautifulsoup4==4.13.4
     # via nbconvert
-bleach[css]==6.2.0
+bleach[css]==6.4.0
     # via nbconvert
 certifi==2025.4.26
     # via requests