diff --git a/context/base/docker-entrypoint.d/20-certs.sh b/context/base/docker-entrypoint.d/20-certs.sh
index 8ba681d..e4ae0f5 100755
--- a/context/base/docker-entrypoint.d/20-certs.sh
+++ b/context/base/docker-entrypoint.d/20-certs.sh
@@ -7,15 +7,16 @@ CERT_KEY="/cert/${FIRST_VIRTUAL_HOST:-localhost}.key"
 CA_CERT="/rootCA/rootCA.pem"
 CA_KEY="/rootCA/rootCA-key.pem"
 
-IP_ADDRESS=$(hostname -i)
-export IP_ADDRESS
-
 envsubst </etc/https-proxy/cert.cfg.template >/tmp/cert.cfg
 
 for host in ${VIRTUAL_HOST:-localhost}; do
 	echo "dns_name = $host" >>/tmp/cert.cfg
 done
 
+for ip_address in $(hostname -i); do
+	echo "ip_address = $ip_address" >>/tmp/cert.cfg
+done
+
 certtool --generate-privkey --outfile "${CERT_KEY}"
 
 if [ ! -r "${CA_CERT}" ] || [ ! -r "${CA_KEY}" ]; then
diff --git a/context/base/etc/https-proxy/cert.cfg.template b/context/base/etc/https-proxy/cert.cfg.template
index c5b03d7..992ce41 100644
--- a/context/base/etc/https-proxy/cert.cfg.template
+++ b/context/base/etc/https-proxy/cert.cfg.template
@@ -2,4 +2,3 @@ organization = "Development certificate"
 unit = "${HOSTNAME}"
 cn = "${FIRST_VIRTUAL_HOST}"
 expiration_days = ${EXPIRATION_DAYS}
-ip_address = "${IP_ADDRESS}"