diff --git a/finality-provider/service/fastsync.go b/finality-provider/service/fastsync.go
index 7f4b6928..aede1a3d 100644
--- a/finality-provider/service/fastsync.go
+++ b/finality-provider/service/fastsync.go
@@ -5,8 +5,8 @@ import (
 
 	"go.uber.org/zap"
 
+	"github.com/babylonlabs-io/finality-provider/lib/math"
 	"github.com/babylonlabs-io/finality-provider/types"
-	"github.com/babylonlabs-io/finality-provider/util"
 )
 
 type FastSyncResult struct {
@@ -36,7 +36,7 @@ func (fp *FinalityProviderInstance) FastSync(startHeight, endHeight uint64) (*Fa
 
 	responses := make([]*types.TxResponse, 0)
 	// make sure it starts at least at the finality activation height
-	startHeight = util.MaxUint64(startHeight, activationBlkHeight)
+	startHeight = math.MaxUint64(startHeight, activationBlkHeight)
 	// the syncedHeight is at least the starting point
 	syncedHeight := startHeight
 	// we may need several rounds to catch-up as we need to limit
diff --git a/finality-provider/service/fp_instance.go b/finality-provider/service/fp_instance.go
index 46435edc..fc3fb844 100644
--- a/finality-provider/service/fp_instance.go
+++ b/finality-provider/service/fp_instance.go
@@ -11,6 +11,7 @@ import (
 	"github.com/avast/retry-go/v4"
 	bbntypes "github.com/babylonlabs-io/babylon/types"
 	ftypes "github.com/babylonlabs-io/babylon/x/finality/types"
+	fppath "github.com/babylonlabs-io/finality-provider/lib/math"
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/gogo/protobuf/jsonpb"
 	"go.uber.org/atomic"
@@ -23,7 +24,6 @@ import (
 	"github.com/babylonlabs-io/finality-provider/finality-provider/store"
 	"github.com/babylonlabs-io/finality-provider/metrics"
 	"github.com/babylonlabs-io/finality-provider/types"
-	"github.com/babylonlabs-io/finality-provider/util"
 )
 
 type FinalityProviderInstance struct {
@@ -410,7 +410,7 @@ func (fp *FinalityProviderInstance) fastSyncStartHeight(lastFinalizedHeight uint
 	}
 
 	// return the max start height by checking the finality activation block height
-	return util.MaxUint64(lastProcessedHeight+1, lastFinalizedHeight+1, finalityActivationBlkHeight), nil
+	return fppath.MaxUint64(lastProcessedHeight+1, lastFinalizedHeight+1, finalityActivationBlkHeight), nil
 }
 
 func (fp *FinalityProviderInstance) hasProcessed(b *types.BlockInfo) bool {
@@ -624,7 +624,7 @@ func (fp *FinalityProviderInstance) CommitPubRand(tipHeight uint64) (*types.TxRe
 	// NOTE: currently, calling this will create and save a list of randomness
 	// in case of failure, randomness that has been created will be overwritten
 	// for safety reason as the same randomness must not be used twice
-	pubRandList, err := fp.getPubRandList(util.MaxUint64(startHeight, activationBlkHeight), fp.cfg.NumPubRand)
+	pubRandList, err := fp.getPubRandList(fppath.MaxUint64(startHeight, activationBlkHeight), fp.cfg.NumPubRand)
 	if err != nil {
 		return nil, fmt.Errorf("failed to generate randomness: %w", err)
 	}
diff --git a/util/math.go b/lib/math/math.go
similarity index 91%
rename from util/math.go
rename to lib/math/math.go
index f9dcb4a8..c4de6dee 100644
--- a/util/math.go
+++ b/lib/math/math.go
@@ -1,4 +1,4 @@
-package util
+package math
 
 func MaxUint64(values ...uint64) (max uint64) {
 	for _, v := range values {