diff --git a/client/src/schema.rs b/client/src/schema.rs
index 756f3d3..88624b1 100644
--- a/client/src/schema.rs
+++ b/client/src/schema.rs
@@ -59,9 +59,9 @@
 }
 
 pub type TableUpdate<T> = HashMap<String, TableUpdateRows<T>>;
-pub type TableUpdateRows<T> = HashMap<String, T>;
+pub type TableUpdateRows<T> = HashMap<String, RowUpdate<T>>;
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize)]
 pub struct RowUpdate<T> {
     pub old: Option<T>,
     pub new: Option<T>,