diff --git a/nginx/snippets/security-headers-base.conf b/nginx/snippets/security-headers-base.conf
index 40104334..a7669ca4 100644
--- a/nginx/snippets/security-headers-base.conf
+++ b/nginx/snippets/security-headers-base.conf
@@ -10,5 +10,5 @@ add_header Expect-CT "enforce, max-age=63072000" always;
 # obsolete and replaced with Content-Security-Policy frame-ancestors 'none'
 add_header X-Frame-Options "DENY" always;
 
-# obsolete and replaced with strong Content-Security-Policy
-add_header X-XSS-Protection "1; mode=block" always;
+# obsolete, unsafe and replaced with strong Content-Security-Policy
+add_header X-XSS-Protection "0" always;