diff --git a/conf/nginx.conf b/conf/nginx.conf
index bdbf14f..4d01938 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -58,6 +58,15 @@ location ^~ __PATH__/ {
   # Remove X-Powered-By, which is an information leak
   fastcgi_hide_header X-Powered-By;
 
+  # Add .mjs as a file extension for javascript
+  # Either include it in the default mime.types list
+  # or include you can include that list explicitly and add the file extension
+  # only for Nextcloud like below:
+  include mime.types;
+  types {
+      text/javascript js mjs;
+  }
+
   # Specify how to handle directories -- specifying `/nextcloud/index.php$request_uri`
   # here as the fallback means that Nginx always exhibits the desired behaviour
   # when a client requests a path that corresponds to a directory that exists