diff --git a/go.mod b/go.mod
index 21164ab..5bac43c 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/blinklabs-io/cardano-models
 go 1.21
 
 require (
-	github.com/blinklabs-io/gouroboros v0.88.0
+	github.com/blinklabs-io/gouroboros v0.89.0
 	github.com/fxamacker/cbor/v2 v2.6.0
 	github.com/go-playground/validator/v10 v10.22.0
 )
diff --git a/go.sum b/go.sum
index 057007b..e4d47d8 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/blinklabs-io/gouroboros v0.88.0 h1:LCZ6V5NxO7YxEjOz5eLuKFSNkZX1y70+H7iYoXkEzgY=
-github.com/blinklabs-io/gouroboros v0.88.0/go.mod h1:1lxsmbJQQMbzta5np5TG0qmb0aNYAeMDvQXcoCwE7XU=
+github.com/blinklabs-io/gouroboros v0.89.0 h1:EGetVz7u7yrVN6oRP/YmwEQFRVK2I7yvF1GxRv/vlio=
+github.com/blinklabs-io/gouroboros v0.89.0/go.mod h1:1lxsmbJQQMbzta5np5TG0qmb0aNYAeMDvQXcoCwE7XU=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fxamacker/cbor/v2 v2.6.0 h1:sU6J2usfADwWlYDAFhZBQ6TnLFBHxgesMrQfQgk1tWA=
diff --git a/tuna.go b/tuna.go
index 4e50656..57f3ae2 100644
--- a/tuna.go
+++ b/tuna.go
@@ -40,18 +40,14 @@ func (t *TunaV1State) MarshalCBOR() ([]byte, error) {
 	tmp := cbor.NewConstructor(
 		0,
 		cbor.IndefLengthList{
-			Items: []any{
-				t.BlockNumber,
-				t.CurrentHash,
-				t.LeadingZeros,
-				t.DifficultyNumber,
-				t.EpochTime,
-				t.RealTimeNow,
-				t.Extra,
-				cbor.IndefLengthList{
-					Items: tmpInterlink,
-				},
-			},
+			t.BlockNumber,
+			t.CurrentHash,
+			t.LeadingZeros,
+			t.DifficultyNumber,
+			t.EpochTime,
+			t.RealTimeNow,
+			t.Extra,
+			cbor.IndefLengthList(tmpInterlink),
 		},
 	)
 	return cbor.Encode(&tmp)
@@ -90,18 +86,14 @@ func (t *TunaV2State) MarshalCBOR() ([]byte, error) {
 	tmp := cbor.NewConstructor(
 		0,
 		cbor.IndefLengthList{
-			Items: []any{
-				t.BlockNumber,
-				t.CurrentHash,
-				t.LeadingZeros,
-				t.DifficultyNumber,
-				t.EpochTime,
-				t.RealTimeNow,
-				cbor.IndefLengthList{
-					Items: tmpInterlink,
-				},
-				t.Extra,
-			},
+			t.BlockNumber,
+			t.CurrentHash,
+			t.LeadingZeros,
+			t.DifficultyNumber,
+			t.EpochTime,
+			t.RealTimeNow,
+			cbor.IndefLengthList(tmpInterlink),
+			t.Extra,
 		},
 	)
 	return cbor.Encode(&tmp)