diff --git a/Dockerfile b/Dockerfile
index c88d0b8..2a7d23d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,16 @@ RUN unzip master.zip -d /root/quicklisp/local-projects && rm master.zip
 RUN mv /root/quicklisp/local-projects/kenzo-master /root/quicklisp/local-projects/kenzo 
 RUN cp /root/quicklisp/local-projects/kenzo/examples/*.ipynb /notebooks/
 RUN cp /root/quicklisp/local-projects/kenzo/examples/*.png /notebooks/
-RUN chmod -R 0444 /notebooks
 
 # Install Kenzo
 RUN sbcl --eval "(ql:quickload :kenzo)"
+
+# Add Tini. Tini operates as a process subreaper for jupyter. This prevents
+# kernel crashes.
+ENV TINI_VERSION v0.6.0
+ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /usr/bin/tini
+RUN chmod +x /usr/bin/tini
+ENTRYPOINT ["/usr/bin/tini", "--"]
+
+EXPOSE 8888
+CMD ["jupyter", "notebook", "--port=8888", "--no-browser", "--ip=0.0.0.0"]