diff --git a/Dockerfile b/Dockerfile
index 505b888..51cd359 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -97,7 +97,7 @@ WORKDIR /opt/netbox/netbox
 RUN mkdir -p static /opt/unit/state/ /opt/unit/tmp/ \
       && chown -R unit:root media /opt/unit/ \
       && chmod -R g+w media /opt/unit/ \
-      && cd /opt/netbox/ && /opt/netbox/venv/bin/python -m mkdocs build \
+      && cd /opt/netbox/ && SECRET_KEY="dummy" /opt/netbox/venv/bin/python -m mkdocs build \
           --config-file /opt/netbox/mkdocs.yml --site-dir /opt/netbox/netbox/project-static/docs/ \
       && SECRET_KEY="dummy" /opt/netbox/venv/bin/python /opt/netbox/netbox/manage.py collectstatic --no-input