diff --git a/conf/init/certs_install.sh b/conf/init/certs_install.sh
index 9f440d8a6..b9fd46dbe 100755
--- a/conf/init/certs_install.sh
+++ b/conf/init/certs_install.sh
@@ -23,5 +23,13 @@ if [ -f /conf/stack/extra_ca_certs ]; then
   cat /conf/stack/extra_ca_certs >> /venv/lib/python2.7/site-packages/requests/cacert.pem
 fi
 
+## Add extra trusted certificates (prefixed)
+for f in $(ls /conf/stack/extra_ca* | grep -v ':$')
+do
+ echo "Installing extra cert $f"
+ cp "/conf/stack/$f" /usr/local/share/ca-certificates/
+ cat "/conf/stack/$f" >> /venv/lib/python2.7/site-packages/requests/cacert.pem
+done
+
 # Update all CA certificates.
 update-ca-certificates