diff --git a/default.nginx.conf b/default.nginx.conf
index cf705c2..ae8986c 100644
--- a/default.nginx.conf
+++ b/default.nginx.conf
@@ -2,7 +2,7 @@ events {}
 
 stream {
     server {
-        listen ${NGINX_PROXY_SOURCE_PORT};
-        proxy_pass ${NGINX_PROXY_SOURCE_ADDRESS};
+        listen $nginx_proxy_source_port;
+        proxy_pass $nginx_proxy_source_address;
     }
 }
\ No newline at end of file