diff --git a/Cargo.lock b/Cargo.lock
index 73d3bf2c5..3a2628e56 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4834,7 +4834,7 @@ dependencies = [
 
 [[package]]
 name = "hyperbridge"
-version = "0.1.3"
+version = "0.1.4"
 dependencies = [
  "clap",
  "cumulus-client-cli",
@@ -5263,7 +5263,7 @@ dependencies = [
 [[package]]
 name = "ismp-demo"
 version = "0.1.0"
-source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#66f4a78edbe91eee2879dc74048bf1278452ee87"
+source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#2450eecec705a7dfdfe382ea6afdb0c4ef7f57c2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -5303,7 +5303,7 @@ dependencies = [
 [[package]]
 name = "ismp-primitives"
 version = "0.1.0"
-source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#66f4a78edbe91eee2879dc74048bf1278452ee87"
+source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#2450eecec705a7dfdfe382ea6afdb0c4ef7f57c2"
 dependencies = [
  "ckb-merkle-mountain-range",
  "frame-support",
@@ -5322,7 +5322,7 @@ dependencies = [
 [[package]]
 name = "ismp-rpc"
 version = "0.1.0"
-source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#66f4a78edbe91eee2879dc74048bf1278452ee87"
+source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#2450eecec705a7dfdfe382ea6afdb0c4ef7f57c2"
 dependencies = [
  "frame-system",
  "hex-literal 0.3.4",
@@ -5344,7 +5344,7 @@ dependencies = [
 [[package]]
 name = "ismp-runtime-api"
 version = "0.1.0"
-source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#66f4a78edbe91eee2879dc74048bf1278452ee87"
+source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#2450eecec705a7dfdfe382ea6afdb0c4ef7f57c2"
 dependencies = [
  "ismp",
  "ismp-primitives",
@@ -7554,7 +7554,7 @@ dependencies = [
 [[package]]
 name = "pallet-ismp"
 version = "0.1.0"
-source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#66f4a78edbe91eee2879dc74048bf1278452ee87"
+source = "git+https://github.com/polytope-labs/substrate-ismp.git?branch=main#2450eecec705a7dfdfe382ea6afdb0c4ef7f57c2"
 dependencies = [
  "ckb-merkle-mountain-range",
  "derive_more",
diff --git a/parachain/node/Cargo.toml b/parachain/node/Cargo.toml
index 258c6ab7e..0fda35f20 100644
--- a/parachain/node/Cargo.toml
+++ b/parachain/node/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hyperbridge"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Polytope Labs <hello@polytope.technology>"]
 description = "The Hyperbridge parachain node"
 edition = "2021"
diff --git a/parachain/runtime/src/lib.rs b/parachain/runtime/src/lib.rs
index ed69a0701..0b67b8343 100644
--- a/parachain/runtime/src/lib.rs
+++ b/parachain/runtime/src/lib.rs
@@ -193,7 +193,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     spec_name: create_runtime_str!("hyperbridge"),
     impl_name: create_runtime_str!("hyperbridge"),
     authoring_version: 1,
-    spec_version: 102,
+    spec_version: 103,
     impl_version: 0,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,
@@ -725,6 +725,11 @@ impl_runtime_apis! {
             Ismp::get_latest_state_machine_height(id)
         }
 
+        /// Return the latest height of the state machine at which we've processed requests
+        fn latest_messaging_height(id: StateMachineId) -> Option<u64> {
+            Ismp::latest_messaging_heights(id)
+        }
+
         /// Get Request Leaf Indices
         fn get_request_leaf_indices(leaf_queries: Vec<LeafIndexQuery>) -> Vec<LeafIndex> {
             Ismp::get_request_leaf_indices(leaf_queries)