diff --git a/Cargo.lock b/Cargo.lock
index 5050cc63f20..fc3fb032ff9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1606,15 +1606,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "ckb-merkle-mountain-range"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f061f97d64fd1822664bdfb722f7ae5469a97b77567390f7442be5b5dc82a5b"
-dependencies = [
- "cfg-if 0.1.10",
-]
-
 [[package]]
 name = "ckb-merkle-mountain-range"
 version = "0.5.2"
@@ -5342,7 +5333,7 @@ dependencies = [
  "bp-beefy",
  "bp-runtime",
  "bp-test-utils",
- "ckb-merkle-mountain-range 0.3.2",
+ "ckb-merkle-mountain-range",
  "frame-support",
  "frame-system",
  "log",
@@ -8584,7 +8575,7 @@ name = "sp-mmr-primitives"
 version = "26.0.0"
 source = "git+https://github.com/paritytech/polkadot-sdk?branch=master#e6bd9205432bb524e94c9bd13048d645ec9aa5c7"
 dependencies = [
- "ckb-merkle-mountain-range 0.5.2",
+ "ckb-merkle-mountain-range",
  "log",
  "parity-scale-codec",
  "scale-info",
diff --git a/modules/beefy/Cargo.toml b/modules/beefy/Cargo.toml
index d0e5204dcbe..2c552430c98 100644
--- a/modules/beefy/Cargo.toml
+++ b/modules/beefy/Cargo.toml
@@ -32,7 +32,7 @@ sp-std = { git = "https://github.com/paritytech/polkadot-sdk", branch = "master"
 
 [dev-dependencies]
 sp-consensus-beefy = { git = "https://github.com/paritytech/polkadot-sdk", branch = "master" }
-mmr-lib = { package = "ckb-merkle-mountain-range", version = "0.3.2" }
+mmr-lib = { package = "ckb-merkle-mountain-range", version = "0.5.2" }
 pallet-beefy-mmr = { git = "https://github.com/paritytech/polkadot-sdk", branch = "master" }
 pallet-mmr = { git = "https://github.com/paritytech/polkadot-sdk", branch = "master" }
 rand = "0.8.5"
diff --git a/modules/beefy/src/mock_chain.rs b/modules/beefy/src/mock_chain.rs
index c4fa74915bf..c83907f8395 100644
--- a/modules/beefy/src/mock_chain.rs
+++ b/modules/beefy/src/mock_chain.rs
@@ -290,10 +290,10 @@ pub struct BridgedMmrHashMerge;
 impl mmr_lib::Merge for BridgedMmrHashMerge {
 	type Item = TestBridgedMmrNode;
 
-	fn merge(left: &Self::Item, right: &Self::Item) -> Self::Item {
+	fn merge(left: &Self::Item, right: &Self::Item) -> mmr_lib::Result<Self::Item> {
 		let mut concat = left.hash().as_ref().to_vec();
 		concat.extend_from_slice(right.hash().as_ref());
 
-		TestBridgedMmrNode::Hash(TestBridgedMmrHashing::hash(&concat))
+		Ok(TestBridgedMmrNode::Hash(TestBridgedMmrHashing::hash(&concat)))
 	}
 }