diff --git a/crates/frontend/public/assets/style.css b/crates/frontend/public/assets/style.css
index e3bd2db..01b8d00 100644
--- a/crates/frontend/public/assets/style.css
+++ b/crates/frontend/public/assets/style.css
@@ -1,6 +1,7 @@
 body {
   font-family: sans-serif;
-  margin: 0;
+  margin: 0 auto;
+  max-width: 1200px;
 }
 
 * {
diff --git a/crates/frontend/src/config.rs b/crates/frontend/src/config.rs
index e7e813a..7268de6 100644
--- a/crates/frontend/src/config.rs
+++ b/crates/frontend/src/config.rs
@@ -23,6 +23,7 @@ pub struct OidcConfig {
     pub client_id: ClientId,
     pub client_secret: Option<ClientSecret>,
     pub scopes: Vec<Scope>,
+    #[serde(default)]
     pub allow_sign_up: bool,
     pub require_group: Option<String>,
     #[serde(default)]