diff --git a/Dockerfile.jupyterhub b/Dockerfile.jupyterhub
index 7b51e8b..1476d2e 100644
--- a/Dockerfile.jupyterhub
+++ b/Dockerfile.jupyterhub
@@ -3,11 +3,11 @@
 FROM jupyterhub/jupyterhub-onbuild:0.7.2
 
 # Install dockerspawner, oauth, postgres
-RUN /opt/conda/bin/conda install psycopg2=2.7 && \
+RUN /opt/conda/bin/conda install -yq psycopg2=2.7 && \
     /opt/conda/bin/conda clean -tipsy && \
-    /opt/conda/bin/pip install \
-    oauthenticator==0.6.* \
-    dockerspawner==0.8.*
+    /opt/conda/bin/pip install --no-cache-dir \
+        oauthenticator==0.7.* \
+        dockerspawner==0.9.*
 
 # Copy TLS certificate and key
 ENV SSL_CERT /srv/jupyterhub/secrets/jupyterhub.crt