diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2bc01b0..fca0ead 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ on:
     inputs:
       toolchain:
         description: 'Default Rust Toolchain'
-        default: "1.73.0"
+        default: "1.78.0"
         required: true
         type: string
       target:
@@ -31,7 +31,7 @@ on:
         type: string
 
 env:
-  TOOLCHAIN: ${{ inputs.toolchain || '1.73.0' }}
+  TOOLCHAIN: ${{ inputs.toolchain || '1.78.0' }}
   TARGET: ${{ inputs.target || 'wasm32-unknown-unknown' }}
   REF: ${{ github.event_name == 'push' && github.ref || inputs.branch || 'main' }}
   ID: ${{ inputs.id || 'scheduled' }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 18a4d9a..e683412 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,7 +15,7 @@ jobs:
           fetch-depth: 1
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.73.0
+          toolchain: 1.78.0
           components: clippy
           profile: minimal
           override: true
@@ -31,7 +31,7 @@ jobs:
           fetch-depth: 1
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.73.0
+          toolchain: 1.78.0
           components: rustfmt
           profile: minimal
           override: true
@@ -49,7 +49,7 @@ jobs:
           fetch-depth: 1
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.73.0
+          toolchain: 1.78.0
           profile: minimal
       - run: cargo fetch --verbose
       - run: cargo build
diff --git a/Cargo.lock b/Cargo.lock
index e7f4949..ea31203 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1131,7 +1131,7 @@ dependencies = [
 [[package]]
 name = "neutron-sdk"
 version = "0.11.0"
-source = "git+https://github.com/neutron-org/neutron-sdk?branch=main#a11018a9152bb0065868145266f35e283ac36b8e"
+source = "git+https://github.com/neutron-org/neutron-sdk?branch=main#e0e697a5c8f2960da1c1e6f4a5fd42b1c0dfb5b7"
 dependencies = [
  "bech32 0.9.1",
  "chrono",
@@ -1155,7 +1155,7 @@ dependencies = [
 [[package]]
 name = "neutron-std-derive"
 version = "0.20.1"
-source = "git+https://github.com/neutron-org/neutron-sdk?branch=main#a11018a9152bb0065868145266f35e283ac36b8e"
+source = "git+https://github.com/neutron-org/neutron-sdk?branch=main#e0e697a5c8f2960da1c1e6f4a5fd42b1c0dfb5b7"
 dependencies = [
  "itertools 0.10.5",
  "proc-macro2",
diff --git a/Makefile b/Makefile
index 0942ee6..7f2ba67 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ compile:
 	    --mount type=volume,source="$(notdir $(CURDIR))_cache",target=/target \
 	    --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
 	    --platform linux/amd64 \
-	    cosmwasm/workspace-optimizer:0.15.0
+	    cosmwasm/workspace-optimizer:0.16.0
 
 check_contracts:
 	@cargo install cosmwasm-check --version 2.0.4 --locked
diff --git a/contracts/neutron_interchain_queries/schema/execute_msg.json b/contracts/neutron_interchain_queries/schema/execute_msg.json
index 2b7f86e..0faca5d 100644
--- a/contracts/neutron_interchain_queries/schema/execute_msg.json
+++ b/contracts/neutron_interchain_queries/schema/execute_msg.json
@@ -224,7 +224,7 @@
           "type": "object",
           "required": [
             "connection_id",
-            "recipient",
+            "recipients",
             "update_period"
           ],
           "properties": {
@@ -239,8 +239,11 @@
               "format": "uint64",
               "minimum": 0.0
             },
-            "recipient": {
-              "type": "string"
+            "recipients": {
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
             },
             "update_period": {
               "type": "integer",
diff --git a/contracts/neutron_interchain_queries/src/contract.rs b/contracts/neutron_interchain_queries/src/contract.rs
index 169e321..ca7619a 100644
--- a/contracts/neutron_interchain_queries/src/contract.rs
+++ b/contracts/neutron_interchain_queries/src/contract.rs
@@ -35,6 +35,7 @@ use neutron_sdk::interchain_queries::get_registered_query;
 use neutron_sdk::interchain_queries::types::{
     QueryPayload, TransactionFilterItem, TransactionFilterOp, TransactionFilterValue,
 };
+use neutron_sdk::interchain_queries::v045::types::HEIGHT_FIELD;
 use neutron_sdk::interchain_queries::v047::queries::{
     query_balance, query_bank_total, query_delegations, query_distribution_fee_pool,
     query_government_proposal_votes, query_government_proposals, query_staking_validators,
@@ -45,7 +46,7 @@ use neutron_sdk::interchain_queries::v047::register_queries::{
     new_register_delegator_delegations_query_msg,
     new_register_delegator_unbonding_delegations_query_msg,
     new_register_distribution_fee_pool_query_msg, new_register_gov_proposals_query_msg,
-    new_register_staking_validators_query_msg, new_register_transfers_query_msg,
+    new_register_staking_validators_query_msg,
 };
 use neutron_sdk::interchain_queries::v047::register_queries::{
     new_register_gov_proposals_voters_votes_query_msg,
@@ -144,10 +145,10 @@ pub fn execute(
         } => register_validators_signing_infos_query(connection_id, validators, update_period),
         ExecuteMsg::RegisterTransfersQuery {
             connection_id,
-            recipient,
+            recipients,
             update_period,
             min_height,
-        } => register_transfers_query(connection_id, recipient, update_period, min_height),
+        } => register_transfers_query(connection_id, recipients, update_period, min_height),
         ExecuteMsg::UpdateInterchainQuery {
             query_id,
             new_keys,
@@ -284,12 +285,32 @@ pub fn register_validators_signing_infos_query(
 
 pub fn register_transfers_query(
     connection_id: String,
-    recipient: String,
+    recipients: Vec<String>,
     update_period: u64,
     min_height: Option<u64>,
 ) -> NeutronResult<Response<NeutronMsg>> {
-    let msg =
-        new_register_transfers_query_msg(connection_id, recipient, update_period, min_height)?;
+    let mut query_data: Vec<TransactionFilterItem> = recipients
+        .into_iter()
+        .map(|r| TransactionFilterItem {
+            field: RECIPIENT_FIELD.to_string(),
+            op: TransactionFilterOp::Eq,
+            value: TransactionFilterValue::String(r),
+        })
+        .collect();
+
+    if let Some(min_height) = min_height {
+        query_data.push(TransactionFilterItem {
+            field: HEIGHT_FIELD.to_string(),
+            op: TransactionFilterOp::Gte,
+            value: TransactionFilterValue::Int(min_height),
+        })
+    }
+
+    let msg = NeutronMsg::register_interchain_query(
+        QueryPayload::TX(query_data),
+        connection_id,
+        update_period,
+    )?;
 
     Ok(Response::new().add_message(msg))
 }
diff --git a/contracts/neutron_interchain_queries/src/msg.rs b/contracts/neutron_interchain_queries/src/msg.rs
index ddc0971..311a181 100644
--- a/contracts/neutron_interchain_queries/src/msg.rs
+++ b/contracts/neutron_interchain_queries/src/msg.rs
@@ -43,7 +43,7 @@ pub enum ExecuteMsg {
     RegisterTransfersQuery {
         connection_id: String,
         update_period: u64,
-        recipient: String,
+        recipients: Vec<String>,
         min_height: Option<u64>,
     },
     RegisterDelegatorDelegationsQuery {
diff --git a/contracts/neutron_interchain_queries/src/testing/tests.rs b/contracts/neutron_interchain_queries/src/testing/tests.rs
index 04b0902..d0ee479 100644
--- a/contracts/neutron_interchain_queries/src/testing/tests.rs
+++ b/contracts/neutron_interchain_queries/src/testing/tests.rs
@@ -1000,7 +1000,7 @@ fn test_sudo_tx_query_result_callback() {
     let msg = ExecuteMsg::RegisterTransfersQuery {
         connection_id: "connection".to_string(),
         update_period: 1u64,
-        recipient: watched_addr.clone(),
+        recipients: vec![watched_addr.clone()],
         min_height: None,
     };
     execute(
@@ -1104,7 +1104,7 @@ fn test_sudo_tx_query_result_min_height_callback() {
     let msg = ExecuteMsg::RegisterTransfersQuery {
         connection_id: "connection".to_string(),
         update_period: 1u64,
-        recipient: watched_addr.clone(),
+        recipients: vec![watched_addr.clone()],
         min_height: Some(100000),
     };
     execute(
diff --git a/contracts/neutron_interchain_txs/src/contract.rs b/contracts/neutron_interchain_txs/src/contract.rs
index 20ff287..efc4660 100644
--- a/contracts/neutron_interchain_txs/src/contract.rs
+++ b/contracts/neutron_interchain_txs/src/contract.rs
@@ -346,7 +346,7 @@ fn execute_undelegate(
             amount: amount.to_string(),
         }),
     };
-    let mut buf = Vec::new();
+    let mut buf = Vec::with_capacity(delegate_msg.encoded_len());
     buf.reserve(delegate_msg.encoded_len());
 
     if let Err(e) = delegate_msg.encode(&mut buf) {
@@ -403,7 +403,7 @@ fn do_delegate(
             amount: info.amount.to_string(),
         }),
     };
-    let mut buf = Vec::new();
+    let mut buf = Vec::with_capacity(delegate_msg.encoded_len());
     buf.reserve(delegate_msg.encoded_len());
 
     if let Err(e) = delegate_msg.encode(&mut buf) {
diff --git a/contracts/neutron_validator_test/src/contract.rs b/contracts/neutron_validator_test/src/contract.rs
index 9288521..31ee097 100644
--- a/contracts/neutron_validator_test/src/contract.rs
+++ b/contracts/neutron_validator_test/src/contract.rs
@@ -350,7 +350,7 @@ fn execute_undelegate(
             amount: amount.to_string(),
         }),
     };
-    let mut buf = Vec::new();
+    let mut buf = Vec::with_capacity(delegate_msg.encoded_len());
     buf.reserve(delegate_msg.encoded_len());
 
     if let Err(e) = delegate_msg.encode(&mut buf) {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 8142c30..5198580 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.73.0"
+channel = "1.78.0"