diff --git a/base-notebook/Dockerfile b/base-notebook/Dockerfile
index b94cbef1..f703bdc3 100644
--- a/base-notebook/Dockerfile
+++ b/base-notebook/Dockerfile
@@ -69,7 +69,7 @@ RUN sed -re "s/c.ServerApp/c.NotebookApp/g" \
 # HEALTHCHECK documentation: https://docs.docker.com/engine/reference/builder/#healthcheck
 # This healtcheck works well for `lab`, `notebook`, `nbclassic`, `server` and `retro` jupyter commands
 # https://github.com/jupyter/docker-stacks/issues/915#issuecomment-1068528799
-HEALTHCHECK  --interval=5s --timeout=3s --start-period=5s --retries=3 \
+HEALTHCHECK --interval=5s --timeout=3s --start-period=5s --retries=3 \
     CMD /etc/jupyter/docker_healthcheck.py || exit 1
 
 # Switch back to jovyan to avoid accidental container runs as root