diff --git a/Cargo.lock b/Cargo.lock
index 7241da3..f099d04 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -104,7 +104,7 @@ checksum = "6b2d54853319fd101b8dd81de382bcbf3e03410a64d8928bbee85a3e7dcde483"
 [[package]]
 name = "anchor-attribute-access-control"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -117,7 +117,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-account"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -131,7 +131,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-constant"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "proc-macro2 1.0.47",
@@ -141,7 +141,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-error"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "proc-macro2 1.0.47",
@@ -152,7 +152,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-event"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -164,7 +164,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-interface"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -177,7 +177,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-program"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -189,7 +189,7 @@ dependencies = [
 [[package]]
 name = "anchor-attribute-state"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -201,7 +201,7 @@ dependencies = [
 [[package]]
 name = "anchor-client"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-lang",
  "anyhow",
@@ -217,7 +217,7 @@ dependencies = [
 [[package]]
 name = "anchor-derive-accounts"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-syn",
  "anyhow",
@@ -229,7 +229,7 @@ dependencies = [
 [[package]]
 name = "anchor-lang"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-attribute-access-control",
  "anchor-attribute-account",
@@ -252,7 +252,7 @@ dependencies = [
 [[package]]
 name = "anchor-spl"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-lang",
  "solana-program",
@@ -263,7 +263,7 @@ dependencies = [
 [[package]]
 name = "anchor-syn"
 version = "0.25.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anyhow",
  "bs58 0.3.1",
@@ -972,7 +972,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 [[package]]
 name = "checked_math"
 version = "0.1.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "proc-macro-error",
  "proc-macro2 1.0.47",
@@ -1078,7 +1078,7 @@ dependencies = [
 [[package]]
 name = "client"
 version = "0.1.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-client",
  "anchor-lang",
@@ -3012,7 +3012,7 @@ dependencies = [
 [[package]]
 name = "mango-v4"
 version = "0.1.0"
-source = "git+https://github.com/blockworks-foundation/mango-v4?branch=ckamm/accountfetcher-send#0bad232315b6c5ddf420d728dfcb13c18a0fb50f"
+source = "git+https://github.com/blockworks-foundation/mango-v4?branch=dev#5019864b844ca6633ee7d1356c763d78fc52ad64"
 dependencies = [
  "anchor-lang",
  "anchor-spl",
diff --git a/Cargo.toml b/Cargo.toml
index d6a6bc1..392599a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ members = [
 # for gzip encoded responses
 jsonrpc-core-client = { git = "https://github.com/ckamm/jsonrpc.git", branch = "ckamm/http-with-gzip" }
 # force usage of mango-v4 submodules with 1.14.9 support
-anchor-spl = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
-anchor-lang = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
-anchor-client = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
+anchor-spl = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
+anchor-lang = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
+anchor-client = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
 switchboard-v2 = { git = "https://github.com/blockworks-foundation/sbv2-solana", branch = "mango-v4" }
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index 82f7e9c..db3bac2 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -16,7 +16,7 @@ solana-client = "~1.14.9"
 solana-account-decoder = "~1.14.9"
 solana-sdk = "~1.14.9"
 
-mango-v4 = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
+mango-v4 = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
 arrayref = "*"
 bytemuck = "*"
 fixed = { version = "*", features = ["serde"] }
diff --git a/lib/src/grpc_plugin_source.rs b/lib/src/grpc_plugin_source.rs
index 3a4cc78..7d32947 100644
--- a/lib/src/grpc_plugin_source.rs
+++ b/lib/src/grpc_plugin_source.rs
@@ -396,6 +396,8 @@ pub async fn process_events(
         metrics_sender.register_u64("grpc_account_writes".into(), MetricType::Counter);
     let mut metric_account_queue =
         metrics_sender.register_u64("account_write_queue".into(), MetricType::Gauge);
+    let mut metric_dedup_queue =
+        metrics_sender.register_u64("dedup_queue".into(), MetricType::Gauge);
     let mut metric_slot_queue =
         metrics_sender.register_u64("slot_update_queue".into(), MetricType::Gauge);
     let mut metric_slot_updates =
@@ -406,6 +408,7 @@ pub async fn process_events(
         metrics_sender.register_u64("grpc_snapshot_account_writes".into(), MetricType::Counter);
 
     loop {
+        metric_dedup_queue.set(msg_receiver.len() as u64);
         let msg = msg_receiver.recv().await.expect("sender must not close");
         use geyser::{subscribe_update::UpdateOneof};
         match msg {
diff --git a/lib/src/orderbook_filter.rs b/lib/src/orderbook_filter.rs
index aa9a5c3..73619d6 100644
--- a/lib/src/orderbook_filter.rs
+++ b/lib/src/orderbook_filter.rs
@@ -101,7 +101,7 @@ impl Serialize for OrderbookCheckpoint {
         let mut state = serializer.serialize_struct("OrderbookCheckpoint", 3)?;
         state.serialize_field("market", &self.market)?;
         state.serialize_field("bids", &self.bids)?;
-        state.serialize_field("bids", &self.asks)?;
+        state.serialize_field("asks", &self.asks)?;
         state.serialize_field("slot", &self.slot)?;
         state.serialize_field("write_version", &self.write_version)?;
 
diff --git a/service-mango-orderbook/Cargo.toml b/service-mango-orderbook/Cargo.toml
index 88467a1..cad41db 100644
--- a/service-mango-orderbook/Cargo.toml
+++ b/service-mango-orderbook/Cargo.toml
@@ -24,8 +24,8 @@ tokio = { version = "1", features = ["full"] }
 tokio-tungstenite = "0.17"
 bytemuck = "1.7.2"
 
-mango-v4 = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
-client = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
+mango-v4 = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
+client = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
 serum_dex = { git = "https://github.com/openbook-dex/program", branch = "master" }
 anchor-lang = "0.25.0"
 anchor-client = "0.25.0"
diff --git a/service-mango-pnl/Cargo.toml b/service-mango-pnl/Cargo.toml
index e958aea..a3f9558 100644
--- a/service-mango-pnl/Cargo.toml
+++ b/service-mango-pnl/Cargo.toml
@@ -21,7 +21,7 @@ tokio = { version = "1", features = ["full"] }
 
 serde = "1.0.130"
 serde_derive = "1.0.130"
-mango-v4 = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
-client = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "ckamm/accountfetcher-send" }
+mango-v4 = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
+client = { git = "https://github.com/blockworks-foundation/mango-v4", branch = "dev" }
 anchor-lang = "0.25.0"
 anchor-client = "0.25.0"