diff --git a/start-jupyter b/start-jupyter
index 06ade876de5771de8ef486347358bc43f86fa9d0..de4e214e3d2e8984dc86d77db5055df25430e979 100755
--- a/start-jupyter
+++ b/start-jupyter
@@ -293,7 +293,7 @@ function open_tunnel () {
                "${SJ_USERNAME}@${node}"; then
             echo "Please consider updating your local ssh client!"
             ssh -o ForwardX11=no \
-                -o StrictHostKeyChecking=no \
+                -o StrictHostKeyChecking=ask \
                 -o ProxyCommand="ssh ${SJ_USERNAME}@${SJ_FRONTEND_HOST} nc ${node} 22" \
                 -L "${port}:localhost:${port}" \
                 -Nf \