diff --git a/SalishSeaTools/envs/requirements.txt b/SalishSeaTools/envs/requirements.txt
index 4548a3f7..240e1c24 100644
--- a/SalishSeaTools/envs/requirements.txt
+++ b/SalishSeaTools/envs/requirements.txt
@@ -91,7 +91,7 @@ jupyter_client==8.8.0
 jupyter_core==5.9.1
 jupyter-events==0.12.0
 jupyter-lsp==2.3.0
-jupyter_server==2.18.0
+jupyter_server==2.20.0
 jupyter_server_terminals==0.5.4
 jupyterlab==4.5.7
 jupyterlab_pygments==0.3.0