diff --git a/go.mod b/go.mod
index 5f01449..00db2a1 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.24
 
 require (
 	github.com/attestantio/go-builder-client v0.6.1
-	github.com/attestantio/go-eth2-client v0.24.0
+	github.com/attestantio/go-eth2-client v0.25.1-0.20250603135601-6ac0bfda7fda
 	github.com/consensys/gnark-crypto v0.16.0
 	github.com/ethereum/go-ethereum v1.15.2
 	github.com/stretchr/testify v1.10.0
@@ -49,3 +49,5 @@ require (
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	rsc.io/tmplfunc v0.0.3 // indirect
 )
+
+replace github.com/attestantio/go-builder-client => github.com/bharath-123/go-builder-client v0.0.0-20250626135301-b3bfa7d447a0
diff --git a/go.sum b/go.sum
index 11d5fa5..6257fcd 100644
--- a/go.sum
+++ b/go.sum
@@ -1,9 +1,9 @@
 github.com/VictoriaMetrics/fastcache v1.12.2 h1:N0y9ASrJ0F6h0QaC3o6uJb3NIZ9VKLjCM7NQbSmF7WI=
 github.com/VictoriaMetrics/fastcache v1.12.2/go.mod h1:AmC+Nzz1+3G2eCPapF6UcsnkThDcMsQicp4xDukwJYI=
-github.com/attestantio/go-builder-client v0.6.1 h1:fn6PC8aDWx2YbptstR1JKP8NyakiNJJTiOE5f9N0z5Q=
-github.com/attestantio/go-builder-client v0.6.1/go.mod h1:f8wi3HzuPxfJoi2PirpJK3yZhte4SavDgKJbRrKoB1Q=
-github.com/attestantio/go-eth2-client v0.24.0 h1:lGVbcnhlBwRglt1Zs56JOCgXVyLWKFZOmZN8jKhE7Ws=
-github.com/attestantio/go-eth2-client v0.24.0/go.mod h1:/KTLN3WuH1xrJL7ZZrpBoWM1xCCihnFbzequD5L+83o=
+github.com/attestantio/go-eth2-client v0.25.1-0.20250603135601-6ac0bfda7fda h1:Wc7YGICtTWKNZvMjpIN/l6HKTj9POEU9N67NIWWWOk0=
+github.com/attestantio/go-eth2-client v0.25.1-0.20250603135601-6ac0bfda7fda/go.mod h1:fvULSL9WtNskkOB4i+Yyr6BKpNHXvmpGZj9969fCrfY=
+github.com/bharath-123/go-builder-client v0.0.0-20250626135301-b3bfa7d447a0 h1:GXOkX7tDTtfFJW0bdMXfMkMVIZElRsU+ig48J+5ZtHM=
+github.com/bharath-123/go-builder-client v0.0.0-20250626135301-b3bfa7d447a0/go.mod h1:kF22wesT/Xu6gMEQ/sjXM0N/NRfE82kIXEzgBh3+ZA8=
 github.com/bits-and-blooms/bitset v1.20.0 h1:2F+rfL86jE2d/bmw7OhqUg2Sj/1rURkBn3MdfoPyRVU=
 github.com/bits-and-blooms/bitset v1.20.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
diff --git a/utils/utils.go b/utils/utils.go
index 2235632..bd6c7fe 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -150,6 +150,17 @@ func PayloadToPayloadHeader(payload *api.VersionedExecutionPayload) (*api.Versio
 			Version: spec.DataVersionElectra,
 			Electra: header,
 		}, nil
+	case spec.DataVersionFulu:
+		// Fulu uses the same ExecutionPayload as Deneb
+		header, err := denebPayloadToPayloadHeader(payload.Fulu)
+		if err != nil {
+			return nil, err
+		}
+
+		return &api.VersionedExecutionPayloadHeader{
+			Version: spec.DataVersionFulu,
+			Fulu:    header,
+		}, nil
 	case spec.DataVersionUnknown, spec.DataVersionPhase0, spec.DataVersionAltair:
 		return nil, fmt.Errorf("%w: %d", ErrUnsupportedVersion, payload.Version)
 	default:
@@ -301,6 +312,13 @@ func ComputeBlockHash(payload *api.VersionedExecutionPayload, parentBeaconRoot *
 			return phase0.Hash32{}, err
 		}
 		return phase0.Hash32(header.Hash()), nil
+	case spec.DataVersionFulu:
+		// Fulu uses the same ExecutionPayload as Deneb
+		header, err := denebExecutionPayloadToBlockHeader(payload.Fulu, parentBeaconRoot)
+		if err != nil {
+			return phase0.Hash32{}, err
+		}
+		return phase0.Hash32(header.Hash()), nil
 	case spec.DataVersionPhase0, spec.DataVersionAltair:
 		return phase0.Hash32{}, fmt.Errorf("%w: %d", ErrUnsupportedVersion, payload.Version)
 	case spec.DataVersionUnknown: