diff --git a/crates/frontend/src/config.rs b/crates/frontend/src/config.rs
index 54147ae..3d13679 100644
--- a/crates/frontend/src/config.rs
+++ b/crates/frontend/src/config.rs
@@ -1,6 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 #[derive(Deserialize, Serialize, Debug, Clone)]
+#[serde(deny_unknown_fields)]
 pub struct FrontendConfig {
     #[serde(serialize_with = "hex::serde::serialize")]
     #[serde(deserialize_with = "hex::serde::deserialize")]
diff --git a/src/config.rs b/src/config.rs
index 1056c06..3edd299 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -2,53 +2,50 @@ use rustical_frontend::FrontendConfig;
 use rustical_store::auth::StaticUserStoreConfig;
 use serde::{Deserialize, Serialize};
 
-fn http_default_host() -> String {
-    "0.0.0.0".to_owned()
-}
-fn http_default_port() -> u16 {
-    4000
-}
-
 #[derive(Debug, Deserialize, Serialize)]
+#[serde(deny_unknown_fields, default)]
 pub struct HttpConfig {
-    #[serde(default = "http_default_host")]
     pub host: String,
-    #[serde(default = "http_default_port")]
     pub port: u16,
 }
 
 impl Default for HttpConfig {
     fn default() -> Self {
         Self {
-            host: http_default_host(),
-            port: http_default_port(),
+            host: "0.0.0.0".to_owned(),
+            port: 4000,
         }
     }
 }
 
 #[derive(Debug, Deserialize, Serialize)]
+#[serde(deny_unknown_fields)]
 pub struct SqliteDataStoreConfig {
     pub db_url: String,
 }
 
 #[derive(Debug, Deserialize, Serialize)]
 #[serde(tag = "backend", rename_all = "snake_case")]
+#[serde(deny_unknown_fields)]
 pub enum DataStoreConfig {
     Sqlite(SqliteDataStoreConfig),
 }
 
 #[derive(Debug, Deserialize, Serialize)]
 #[serde(tag = "backend", rename_all = "snake_case")]
+#[serde(deny_unknown_fields)]
 pub enum AuthConfig {
     Static(StaticUserStoreConfig),
 }
 
 #[derive(Debug, Deserialize, Serialize, Default)]
+#[serde(deny_unknown_fields, default)]
 pub struct TracingConfig {
     pub opentelemetry: bool,
 }
 
 #[derive(Debug, Deserialize, Serialize)]
+#[serde(deny_unknown_fields)]
 pub struct Config {
     pub data_store: DataStoreConfig,
     pub auth: AuthConfig,