diff --git a/bin/liquidator/src/main.rs b/bin/liquidator/src/main.rs
index 90ec8b3b0..1db2e8e86 100644
--- a/bin/liquidator/src/main.rs
+++ b/bin/liquidator/src/main.rs
@@ -190,8 +190,6 @@ async fn main() -> anyhow::Result<()> {
         .map(|s3| s3.market.serum_program)
         .unique()
         .collect_vec();
-    // TODO: Currently the websocket source only supports a single serum program address!
-    assert_eq!(serum_programs.len(), 1);
 
     //
     // feed setup
@@ -211,7 +209,7 @@ async fn main() -> anyhow::Result<()> {
     websocket_source::start(
         websocket_source::Config {
             rpc_ws_url: ws_url.clone(),
-            serum_program: *serum_programs.first().unwrap(),
+            serum_programs,
             open_orders_authority: mango_group,
         },
         mango_oracles.clone(),
diff --git a/bin/settler/src/main.rs b/bin/settler/src/main.rs
index c41af0744..7671e4223 100644
--- a/bin/settler/src/main.rs
+++ b/bin/settler/src/main.rs
@@ -43,10 +43,6 @@ struct Cli {
     #[clap(short, long, env)]
     rpc_url: String,
 
-    // TODO: different serum markets could use different serum programs, should come from registered markets
-    #[clap(long, env)]
-    serum_program: Pubkey,
-
     #[clap(long, env)]
     settler_mango_account: Pubkey,
 
@@ -128,6 +124,13 @@ async fn main() -> anyhow::Result<()> {
         .unique()
         .collect::<Vec<Pubkey>>();
 
+    let serum_programs = group_context
+        .serum3_markets
+        .values()
+        .map(|s3| s3.market.serum_program)
+        .unique()
+        .collect_vec();
+
     //
     // feed setup
     //
@@ -147,7 +150,7 @@ async fn main() -> anyhow::Result<()> {
     websocket_source::start(
         websocket_source::Config {
             rpc_ws_url: ws_url.clone(),
-            serum_program: cli.serum_program,
+            serum_programs,
             open_orders_authority: mango_group,
         },
         mango_oracles.clone(),
diff --git a/lib/client/src/websocket_source.rs b/lib/client/src/websocket_source.rs
index 61c34ad60..426ccf427 100644
--- a/lib/client/src/websocket_source.rs
+++ b/lib/client/src/websocket_source.rs
@@ -20,7 +20,7 @@ use crate::AnyhowWrap;
 
 pub struct Config {
     pub rpc_ws_url: String,
-    pub serum_program: Pubkey,
+    pub serum_programs: Vec<Pubkey>,
     pub open_orders_authority: Pubkey,
 }
 
@@ -67,6 +67,7 @@ async fn feed_data(
             Some(all_accounts_config.clone()),
         )
         .map_err_anyhow()?;
+
     let mut mango_oracles_sub_map = StreamMap::new();
     for oracle in mango_oracles.into_iter() {
         mango_oracles_sub_map.insert(
@@ -84,12 +85,20 @@ async fn feed_data(
                 .map_err_anyhow()?,
         );
     }
-    let mut open_orders_sub = client
-        .program_subscribe(
-            config.serum_program.to_string(),
-            Some(open_orders_accounts_config.clone()),
-        )
-        .map_err_anyhow()?;
+
+    let mut serum3_oo_sub_map = StreamMap::new();
+    for serum_program in config.serum_programs.iter() {
+        serum3_oo_sub_map.insert(
+            *serum_program,
+            client
+                .program_subscribe(
+                    serum_program.to_string(),
+                    Some(open_orders_accounts_config.clone()),
+                )
+                .map_err_anyhow()?,
+        );
+    }
+
     let mut slot_sub = client.slots_updates_subscribe().map_err_anyhow()?;
 
     loop {
@@ -113,9 +122,10 @@ async fn feed_data(
                     return Ok(());
                 }
             },
-            message = open_orders_sub.next() => {
+            message = serum3_oo_sub_map.next() => {
                 if let Some(data) = message {
-                    let response = data.map_err_anyhow()?;
+                    info!("got serum message");
+                    let response = data.1.map_err_anyhow()?;
                     sender.send(Message::Account(AccountUpdate::from_rpc(response)?)).await.expect("sending must succeed");
                 } else {
                     warn!("serum stream closed");