diff --git a/Dockerfile b/Dockerfile
index b63122853f4ba2e8918852972cb5a3d2ceb282ce..c9bed12092ca0dcf5ff118a7e44fa43747eb98e1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM netboxcommunity/netbox
 ENV NAPALM_USERNAME netbox-napalm
 
-RUN apk add git && pip3 install --upgrade napalm cffi napalm-dellos10 
+RUN apk add git zlib && pip3 install --upgrade napalm cffi napalm-dellos10 
 RUN python3 -m pip install --upgrade Pillow
 RUN apk add netbox-qrcode && \
     echo "PLUGINS = ['netbox_qrcode']" >> /etc/netbox/config/configuration.py