diff --git a/Dockerfile b/Dockerfile
index da41619..1274bba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,11 +34,13 @@ WORKDIR /opt/marblecutter
 COPY requirements-server.txt /opt/marblecutter/
 COPY requirements.txt /opt/marblecutter/
 
-RUN pip install -U numpy && \
+RUN pip install -U numpy~=1.16.0 && \
   pip install -r requirements-server.txt && \
   rm -rf /root/.cache
 
+COPY templates /opt/marblecutter/templates
 COPY virtual /opt/marblecutter/virtual
+COPY server.py /opt/marblecutter/server.py
 
 USER nobody
 
diff --git a/README.md b/README.md
index da59383..e5e220e 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # marblecutter-virtual
 
+![Docker Cloud Automated build](https://img.shields.io/docker/cloud/automated/olivierdalang/marblecutter-virtual.svg)
+
 I am a tile server for HTTP(S)-accessible [Cloud Optimized GeoTIFFs
 (COGs)](http://www.cogeo.org/).
 
diff --git a/requirements-server.txt b/requirements-server.txt
index cc2c7b6..c64970d 100644
--- a/requirements-server.txt
+++ b/requirements-server.txt
@@ -1,4 +1,4 @@
 -r requirements.txt
 
 gevent
-gunicorn
+gunicorn<20
diff --git a/requirements.txt b/requirements.txt
index e6500f8..6f272e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,10 @@
 cachetools ~= 2.0.0
 flask-cors
+Pillow < 7
 # marblecutter[web] ~= 0.3.1
 https://github.com/mojodna/marblecutter/archive/5b9040b.tar.gz#egg=marblecutter[web]
 rasterio[s3] ~= 1.0
-numpy
+numpy ~= 1.16.0
 serverless-wsgi
 # temporary workaround for https://github.com/mapbox/rasterio/issues/1651
 mock
\ No newline at end of file
diff --git a/virtual/web.py b/virtual/web.py
index e4fb40a..086581b 100644
--- a/virtual/web.py
+++ b/virtual/web.py
@@ -23,6 +23,7 @@
 
 from .catalogs import VirtualCatalog
 
+logging.basicConfig()
 LOG = logging.getLogger(__name__)
 
 IMAGE_TRANSFORMATION = Image()