diff --git a/src/handlers/sync.rs b/src/handlers/sync.rs
index becf9e3..61db182 100644
--- a/src/handlers/sync.rs
+++ b/src/handlers/sync.rs
@@ -87,10 +87,13 @@ pub async fn get_sync_data(
     let response = SyncResponse {
         profile,
         folders,
+        collections: Vec::new(),
+        policies: Vec::new(),
         ciphers,
         domains: serde_json::Value::Null, // Ignored for basic implementation
+        sends: Vec::new(),
         object: "sync".to_string(),
     };
 
     Ok(Json(response))
-}
\ No newline at end of file
+}
diff --git a/src/models/sync.rs b/src/models/sync.rs
index a4155f0..eedc5c7 100644
--- a/src/models/sync.rs
+++ b/src/models/sync.rs
@@ -3,44 +3,39 @@ use serde::Serialize;
 use serde_json::Value;
 
 #[derive(Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
 pub struct Profile {
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     pub email: String,
     pub id: String,
-    #[serde(rename = "masterPasswordHint")]
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub master_password_hint: Option<String>,
-    #[serde(rename = "securityStamp")]
     pub security_stamp: String,
-    #[serde(rename = "Object")]
     pub object: String,
-    #[serde(rename = "premiumFromOrganization")]
     pub premium_from_organization: bool,
-    #[serde(rename = "forcePasswordReset")]
     pub force_password_reset: bool,
-    #[serde(rename = "emailVerified")]
     pub email_verified: bool,
-    #[serde(rename = "twoFactorEnabled")]
     pub two_factor_enabled: bool,
     pub premium: bool,
-    #[serde(rename = "usesKeyConnector")]
     pub uses_key_connector: bool,
-    #[serde(rename = "creationDate")]
     pub creation_date: String,
-    #[serde(rename = "privateKey")]
     pub private_key: String,
     pub key: String,
 }
 
 #[derive(Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
 pub struct SyncResponse {
-    #[serde(rename = "profile")]
     pub profile: Profile,
-    #[serde(rename = "folders")]
     pub folders: Vec<FolderResponse>,
-    #[serde(rename = "ciphers")]
+    #[serde(default)]
+    pub collections: Vec<Value>,
+    #[serde(default)]
+    pub policies: Vec<Value>,
     pub ciphers: Vec<Cipher>,
-    #[serde(rename = "Domains")]
     pub domains: Value,
-    #[serde(rename = "Object")]
+    #[serde(default)]
+    pub sends: Vec<Value>,
     pub object: String,
 }