diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a8e83c7e1d567830e6089e71cfd9061be33efa1d..198c7c306385da123f4ebaff0b3914dd2442ab29 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,6 @@
 variables:
   docker_registry_user: "robot$$gitlab"
-  docker_image_tag: "1.4"
+  docker_image_tag: "1.5"
 
 stages:
   - build
diff --git a/base/jupyter_notebook_config.py b/base/jupyter_notebook_config.py
index 1e2542d554f3e013f9d06530a766a77cb9c516cc..d82e2241d473dd29b7cf8f656eea90e6629abf76 100644
--- a/base/jupyter_notebook_config.py
+++ b/base/jupyter_notebook_config.py
@@ -7,6 +7,9 @@ c.NotebookApp.port = port
 c.NotebookApp.open_browser = False
 c.NotebookApp.quit_button = False
 
+c.PDFExporter.enabled = False
+c.WebPDFExporter.enabled = False
+
 if os.environ.get('JUPYTERHUB_SERVICE_PREFIX'):
     c.NotebookApp.base_url = os.environ.get('JUPYTERHUB_SERVICE_PREFIX')