diff --git a/nginx.conf b/nginx.conf
index 8537017..bb1fba0 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -27,6 +27,19 @@ server {
     image/svg+xml
     font/woff2;
 
+  # nginx's bundled MIME map does not consistently include .mjs. ONNX Runtime
+  # loads these files as JavaScript modules, which browsers reject when served
+  # as application/octet-stream.
+  location ~* ^/assets/.*\.mjs$ {
+    try_files $uri =404;
+    default_type application/javascript;
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+    add_header Cross-Origin-Opener-Policy "same-origin" always;
+    add_header Cross-Origin-Embedder-Policy "require-corp" always;
+    add_header Cross-Origin-Resource-Policy "same-origin" always;
+  }
+
   location /assets/ {
     try_files $uri =404;
     expires 1y;