diff --git a/docker/nginx.conf b/docker/nginx.conf
index b5ef0c16..e80d72e4 100644
--- a/docker/nginx.conf
+++ b/docker/nginx.conf
@@ -7,6 +7,10 @@ events {
 http {
   include             mime.types;
   default_type        application/octet-stream;
+  types {
+    text/plain yaml;
+    text/plain yml;
+}
 
   sendfile on;