diff --git a/bin/withdrawal-finalizer/src/main.rs b/bin/withdrawal-finalizer/src/main.rs
index e39429fb..780f8bb6 100644
--- a/bin/withdrawal-finalizer/src/main.rs
+++ b/bin/withdrawal-finalizer/src/main.rs
@@ -269,7 +269,7 @@ async fn main() -> Result<()> {
         we_tx_wrapped,
     ));
 
-    let watcher_handle = tokio::spawn(watcher.run(blocks_rx, we_rx, from_l2_block));
+    let watcher_handle = tokio::spawn(watcher.run(blocks_rx, we_rx, from_l2_block, sl_chain_id));
 
     let block_events_handle = tokio::spawn(event_mux.run_with_reconnects(
         config.diamond_proxy_addr,
diff --git a/chain-events/src/block_events.rs b/chain-events/src/block_events.rs
index f48dfccb..9e22e6a7 100644
--- a/chain-events/src/block_events.rs
+++ b/chain-events/src/block_events.rs
@@ -156,7 +156,7 @@ impl BlockEvents {
 
         let past_filter = Filter::new()
             .from_block(from_block)
-            .to_block(latest_block)
+            .to_block(latest_block - 1)
             .address(diamond_proxy_addr)
             .topic0(vec![
                 BlockCommitFilter::signature(),
diff --git a/watcher/src/lib.rs b/watcher/src/lib.rs
index 61462031..51034c8d 100644
--- a/watcher/src/lib.rs
+++ b/watcher/src/lib.rs
@@ -60,6 +60,7 @@ where
         block_events: BE,
         withdrawal_events: WE,
         from_l2_block: u64,
+        sl_chain_id: u32,
     ) -> Result<()>
     where
         BE: Stream<Item = BlockEvent> + Send + 'static,
@@ -90,6 +91,7 @@ where
             pgpool.clone(),
             block_events,
             l2_provider,
+            sl_chain_id,
         ));
         let l2_loop_handler = tokio::spawn(async move {
             run_l2_events_loop(
@@ -346,7 +348,12 @@ async fn process_withdrawals_in_block(
     Ok(())
 }
 
-async fn run_l1_events_loop<BE, M2>(pool: PgPool, be: BE, l2_middleware: M2) -> Result<()>
+async fn run_l1_events_loop<BE, M2>(
+    pool: PgPool,
+    be: BE,
+    l2_middleware: M2,
+    chain_id: u32,
+) -> Result<()>
 where
     BE: Stream<Item = BlockEvent>,
     M2: ZksyncMiddleware,
@@ -357,7 +364,6 @@ where
     let mut batch_begin = Instant::now();
     let batch_backoff = Duration::from_secs(5);
     let batch_size = 1024;
-    let chain_id = l2_middleware.get_chain_id().await?;
     while let Some(event) = be.next().await {
         tracing::debug!("block event {event}");
         block_event_batch.push(event);