diff --git a/Dockerfile b/Dockerfile
index 66a6ebef..c26714ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ MAINTAINER fehguy
 ENV VERSION "v2.2.10"
 ENV FOLDER "swagger-ui-2.2.10"
 ENV API_URL "http://petstore.swagger.io/v2/swagger.json"
+ENV API_URLS ""
 ENV API_KEY "**None**"
 ENV OAUTH_CLIENT_ID "**None**"
 ENV OAUTH_CLIENT_SECRET "**None**"
diff --git a/docker-run.sh b/docker-run.sh
index 6ed3000a..580e4289 100644
--- a/docker-run.sh
+++ b/docker-run.sh
@@ -53,7 +53,14 @@ if [[ -n "$VALIDATOR_URL" ]]; then
   unset TMP_VU
 fi
 
-# replace the PORT that nginx listens on if supplied
-if [[ -n "${PORT}" ]]; then sed -i "s|8080|${PORT}|g" /etc/nginx/nginx.conf; fi
+# replace `url` with `urls` option if API_URLS is set
+if [[ -n "$API_URLS" ]]; then
+    sed -i "s|url: .*,|urls: $API_URLS,|g" $INDEX_FILE
+fi
+
+# replace the PORT that nginx listens on if PORT is supplied
+if [[ -n "${PORT}" ]]; then 
+    sed -i "s|8080|${PORT}|g" /etc/nginx/nginx.conf
+fi
 
 exec nginx -g 'daemon off;'