diff --git a/config/services/reverse-proxy.nix b/config/services/reverse-proxy.nix
index 26bb8417..729927ad 100644
--- a/config/services/reverse-proxy.nix
+++ b/config/services/reverse-proxy.nix
@@ -25,7 +25,7 @@
       '';
     };
     extraConfig = ''
-      proxy_set_header "mastodon.chir.rs";
+      proxy_set_header Host "mastodon.chir.rs";
     '';
   };
 }