diff --git a/source/_headers b/source/_headers
index 060e929..c87df0f 100644
--- a/source/_headers
+++ b/source/_headers
@@ -2,6 +2,7 @@
   X-Frame-Options: DENY
   X-XSS-Protection: 1; mode=block
   X-Content-Type-Options: nosniff
+  Content-Language: en
   Content-Security-Policy: default-src 'self'; child-src 'none'; connect-src 'none'; font-src 'none'; frame-src 'none'; img-src https: 'self'; manifest-src 'none'; media-src 'none'; object-src 'none'; prefetch-src 'none'; script-src https://cdnjs.cloudflare.com 'self'; style-src https://cdnjs.cloudflare.com 'self'; worker-src 'none'; base-uri 'none'; form-action 'none'; block-all-mixed-content; frame-ancestors 'none'
   Referrer-Policy: no-referrer
   Strict-Transport-Security: max-age=31536000