diff --git a/src/config.rs b/src/config.rs
index c59b8e2..2968c38 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -10,7 +10,7 @@ use url::Url;
 #[serde(rename_all = "kebab-case")]
 pub enum UrlProvider {
     Lookahead,
-    UrlMapping,
+    Registry,
 }
 
 #[derive(Debug, Deserialize)]
@@ -27,31 +27,36 @@ pub struct Lookahead {
     pub chain_id: u16,
     #[serde(rename = "relays")]
     pub relays: Vec<String>,
-    #[serde(rename = "registry", deserialize_with = "deserialize_registry")]
-    pub registry: HashMap<BlsPublicKey, Url>,
+    #[serde(rename = "registry", default, deserialize_with = "deserialize_registry")]
+    pub registry: Option<HashMap<BlsPublicKey, Url>>,
     #[serde(rename = "url-provider")]
     pub url_provider: UrlProvider,
 }
 
-fn deserialize_registry<'de, D>(deserializer: D) -> Result<HashMap<BlsPublicKey, Url>, D::Error>
+fn deserialize_registry<'de, D>(
+    deserializer: D,
+) -> Result<Option<HashMap<BlsPublicKey, Url>>, D::Error>
 where
     D: Deserializer<'de>,
 {
-    let temp_registry: HashMap<String, String> = HashMap::deserialize(deserializer)?;
-    let mut registry: HashMap<BlsPublicKey, Url> = HashMap::new();
+    let temp_registry: Option<HashMap<String, String>> = Option::deserialize(deserializer)?;
+    if let Some(temp_registry) = temp_registry {
+        let mut registry: HashMap<BlsPublicKey, Url> = HashMap::new();
 
-    for (key, value) in temp_registry {
-        match BlsPublicKey::from_str(key.as_str()) {
-            Ok(bls_key) => {
-                registry.insert(bls_key, Url::from_str(&value).unwrap());
-            }
-            Err(_) => {
-                return Err(serde::de::Error::custom(format!("Failed to convert key: {}", key)));
+        for (key, value) in temp_registry {
+            match BlsPublicKey::from_str(key.as_str()) {
+                Ok(bls_key) => {
+                    registry.insert(bls_key, Url::from_str(&value).unwrap());
+                }
+                Err(_) => {
+                    return Err(serde::de::Error::custom(format!("Failed to convert key: {}", key)));
+                }
             }
         }
+        Ok(Some(registry))
+    } else {
+        Ok(None)
     }
-
-    Ok(registry)
 }
 
 impl Config {
@@ -88,7 +93,33 @@ mod tests {
         let expected_lookahead = Lookahead {
             chain_id: 1,
             relays: vec!["relay1".to_string(), "relay2".to_string()],
-            registry: expected_registry,
+            registry: Some(expected_registry),
+            url_provider: UrlProvider::Lookahead,
+        };
+
+        let _expected_config = Config {
+            lookahead_providers_relays: vec![expected_lookahead],
+            beacon_nodes: vec!["node1".to_string(), "node2".to_string()],
+        };
+
+        let config: Config = toml::from_str(data).unwrap();
+        assert!(matches!(config, _expected_config));
+    }
+
+    #[test]
+    fn test_deserialize_config_no_lookahead_registry() {
+        let data = r#"
+        beacon-nodes = ["node1", "node2"]
+        [[lookahead]]
+        chain-id = 1
+        url-provider = "lookahead"
+        relays = ["relay1", "relay2"]
+        "#;
+
+        let expected_lookahead = Lookahead {
+            chain_id: 1,
+            relays: vec!["relay1".to_string(), "relay2".to_string()],
+            registry: None,
             url_provider: UrlProvider::Lookahead,
         };
 
diff --git a/src/lookahead/manager.rs b/src/lookahead/manager.rs
index 0ff0138..1dc9978 100644
--- a/src/lookahead/manager.rs
+++ b/src/lookahead/manager.rs
@@ -116,7 +116,9 @@ pub fn lookahead_managers_from_config(
         .build_relay_provider();
         let url_provider = match r_c.url_provider {
             crate::config::UrlProvider::Lookahead => UrlProvider::LookaheadEntry,
-            crate::config::UrlProvider::UrlMapping => UrlProvider::UrlMap(r_c.registry),
+            crate::config::UrlProvider::Registry => {
+                UrlProvider::UrlMap(r_c.registry.expect("registry is empty"))
+            }
         };
         map.insert(r_c.chain_id, LookaheadManager::new(lookahead, provider, url_provider));
     }