diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a74084..8d35f4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,12 +39,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 * [#51](https://github.com/babylonlabs-io/btc-staker/pull/51) Use int64
   for satoshi amount related values.
-
 * [#65](https://github.com/babylonlabs-io/btc-staker/pull/65) Various fixes to
 pre-approval flow. Do not send signed staking transactions to Babylon.
-
+* [#66](https://github.com/babylonlabs-io/btc-staker/pull/66) Bump babylon to
+v0.13.0 as it updates BTC block heights to uint32 and function naming.
 * [#67](https://github.com/babylonlabs-io/btc-staker/pull/67) Enable concurrent
-sending of multiple pre-approval staking transactions
+sending of multiple pre-approval staking transactions.
 
 ## v0.7.2
 
diff --git a/babylonclient/babyloncontroller.go b/babylonclient/babyloncontroller.go
index 7a9a625..59c33bc 100644
--- a/babylonclient/babyloncontroller.go
+++ b/babylonclient/babyloncontroller.go
@@ -171,9 +171,9 @@ func (bc *BabylonController) Params() (*StakingParams, error) {
 		return nil, err
 	}
 
-	minUnbondingTimeU64 := sdkmath.Max[uint64](
+	minUnbondingTimeU64 := sdkmath.Max[uint32](
 		bccParams.CheckpointFinalizationTimeout,
-		uint64(stakingTrackerParams.MinUnbondingTime),
+		uint32(stakingTrackerParams.MinUnbondingTime),
 	)
 
 	if minUnbondingTimeU64 > math.MaxUint16 {
@@ -663,7 +663,7 @@ func (bc *BabylonController) QueryFinalityProvider(btcPubKey *btcec.PublicKey) (
 	}, nil
 }
 
-func (bc *BabylonController) QueryHeaderDepth(headerHash *chainhash.Hash) (uint64, error) {
+func (bc *BabylonController) QueryHeaderDepth(headerHash *chainhash.Hash) (uint32, error) {
 	ctx, cancel := getQueryContext(bc.cfg.Timeout)
 	defer cancel()
 
diff --git a/babylonclient/interface.go b/babylonclient/interface.go
index 77e33a0..de6a6b9 100644
--- a/babylonclient/interface.go
+++ b/babylonclient/interface.go
@@ -70,7 +70,7 @@ type BabylonClient interface {
 	Undelegate(req *UndelegationRequest) (*pv.RelayerTxResponse, error)
 	QueryFinalityProviders(limit uint64, offset uint64) (*FinalityProvidersClientResponse, error)
 	QueryFinalityProvider(btcPubKey *btcec.PublicKey) (*FinalityProviderClientResponse, error)
-	QueryHeaderDepth(headerHash *chainhash.Hash) (uint64, error)
+	QueryHeaderDepth(headerHash *chainhash.Hash) (uint32, error)
 	IsTxAlreadyPartOfDelegation(stakingTxHash *chainhash.Hash) (bool, error)
 	QueryDelegationInfo(stakingTxHash *chainhash.Hash) (*DelegationInfo, error)
 }
@@ -142,9 +142,9 @@ func (m *MockBabylonClient) QueryFinalityProvider(btcPubKey *btcec.PublicKey) (*
 	}
 }
 
-func (m *MockBabylonClient) QueryHeaderDepth(headerHash *chainhash.Hash) (uint64, error) {
+func (m *MockBabylonClient) QueryHeaderDepth(headerHash *chainhash.Hash) (uint32, error) {
 	// return always confirmed depth
-	return uint64(m.ClientParams.ConfirmationTimeBlocks) + 1, nil
+	return m.ClientParams.ConfirmationTimeBlocks + 1, nil
 }
 
 func (m *MockBabylonClient) IsTxAlreadyPartOfDelegation(stakingTxHash *chainhash.Hash) (bool, error) {
diff --git a/go.mod b/go.mod
index e87b4d7..95e8fe4 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	cosmossdk.io/errors v1.0.1
 	cosmossdk.io/math v1.3.0
 	github.com/avast/retry-go/v4 v4.5.1
-	github.com/babylonlabs-io/babylon v0.12.0
+	github.com/babylonlabs-io/babylon v0.13.0
 	github.com/babylonlabs-io/networks/parameters v0.2.2
 	github.com/btcsuite/btcd v0.24.2
 	github.com/btcsuite/btcd/btcec/v2 v2.3.2
diff --git a/go.sum b/go.sum
index 61c9a22..266f12b 100644
--- a/go.sum
+++ b/go.sum
@@ -287,8 +287,8 @@ github.com/aws/aws-sdk-go v1.44.122/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX
 github.com/aws/aws-sdk-go v1.44.312 h1:llrElfzeqG/YOLFFKjg1xNpZCFJ2xraIi3PqSuP+95k=
 github.com/aws/aws-sdk-go v1.44.312/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
-github.com/babylonlabs-io/babylon v0.12.0 h1:s2OTcxpk0RzrkVBnVTfnPdJVYDSqnm/33YKPQqEzNCE=
-github.com/babylonlabs-io/babylon v0.12.0/go.mod h1:ZOrTde9vs2xoqGTFw4xhupu2CMulnpywiuk0eh4kPOw=
+github.com/babylonlabs-io/babylon v0.13.0 h1:h7cazmFmItePvZHEbLhDbsq2l7xN4e2AjDHRM7zDLkg=
+github.com/babylonlabs-io/babylon v0.13.0/go.mod h1:cxRwVqVLoJ39FpyovTEHJLu1lwwrM1tE8davu7nRHwY=
 github.com/babylonlabs-io/networks/parameters v0.2.2 h1:TCu39fZvjX5f6ZZrjhYe54M6wWxglNewuKu56yE+zrc=
 github.com/babylonlabs-io/networks/parameters v0.2.2/go.mod h1:iEJVOzaLsE33vpP7J4u+CRGfkSIfErUAwRmgCFCBpyI=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
diff --git a/staker/types.go b/staker/types.go
index 6a59991..f31db69 100644
--- a/staker/types.go
+++ b/staker/types.go
@@ -517,7 +517,7 @@ func parseWatchStakingRequest(
 	}
 
 	// 2. Check wheter slashing tx match staking tx
-	err = staking.CheckTransactions(
+	err = staking.CheckSlashingTxMatchFundingTx(
 		slashingTx,
 		stakingTx,
 		stakingOutputIdx,
@@ -584,7 +584,7 @@ func parseWatchStakingRequest(
 		return nil, fmt.Errorf("failed to watch staking tx. Unbonding output does not match output produced from provided values")
 	}
 
-	err = staking.CheckTransactions(
+	err = staking.CheckSlashingTxMatchFundingTx(
 		slashUnbondingTx,
 		unbondingTx,
 		0,