diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 28670bb0..d20d40aa 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -453,9 +453,8 @@ http {
             brotli_static off;
         }
 
-        location ~ "\.(?:atom|pdf)$" {
+        location ~ "\.atom$" {
             include snippets/security-headers.conf;
-            # Chromium PDF range requests use wrong origin: https://bugs.chromium.org/p/chromium/issues/detail?id=1074261
             # Thunderbird uses wrong origin for feeds: https://bugzilla.mozilla.org/show_bug.cgi?id=1698755
             add_header Cross-Origin-Resource-Policy "cross-origin" always;
             add_header Cache-Control "public, max-age=1800";