diff --git a/codec_test.go b/codec_test.go
index 02edb1a..2a2c5e4 100644
--- a/codec_test.go
+++ b/codec_test.go
@@ -30,8 +30,8 @@ func TestSpec(t *testing.T) {
 	if err := NewCodec().Unmarshal(buf, data, MessageSpec(newSpec())); err != nil {
 		t.Fatal(err)
 	}
-	if data.F7.Value != 311204852 {
-		t.Fatalf("invalid data %#+v", data.F7.Value)
+	if data.F7.Value() != 311204852 {
+		t.Fatalf("invalid data %#+v", data.F7.Value())
 	}
 }
 
diff --git a/go.mod b/go.mod
index b031408..51813aa 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,8 @@ module go.unistack.org/micro-codec-iso8583/v3
 go 1.16
 
 require (
-	github.com/moov-io/iso8583 v0.12.1
+	github.com/google/gnostic v0.6.9 // indirect
+	github.com/moov-io/iso8583 v0.13.0
 	go.unistack.org/micro/v3 v3.9.11
+	google.golang.org/protobuf v1.28.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 1e656ac..6ee3e14 100644
--- a/go.sum
+++ b/go.sum
@@ -42,6 +42,8 @@ github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiu
 github.com/google/gnostic v0.6.6/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
 github.com/google/gnostic v0.6.8 h1:bT56GPYBWh1tvBuBEd94qcS3+60b+y0HQur0ITkGuCk=
 github.com/google/gnostic v0.6.8/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
+github.com/google/gnostic v0.6.9 h1:ZK/5VhkoX835RikCHpSUJV9a+S3e1zLh59YnyWeBW+0=
+github.com/google/gnostic v0.6.9/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
@@ -62,8 +64,8 @@ github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/mediocregopher/radix.v2 v0.0.0-20181115013041-b67df6e626f9/go.mod h1:fLRUbhbSd5Px2yKUaGYYPltlyxi1guJz1vCmo1RQL50=
-github.com/moov-io/iso8583 v0.12.1 h1:QZ7GYV4VY7lmCtcaXHlxbkvu7jj1A85QnzMbDPzIpuU=
-github.com/moov-io/iso8583 v0.12.1/go.mod h1:Ul1q5ztEUGpFCw3I+bp1HRHBKymgfBTBiKa0JhdeaAM=
+github.com/moov-io/iso8583 v0.13.0 h1:uzvpSQh4YAePHIwKSYOC5NmGJEJDLB/GE9bq4Te/CYA=
+github.com/moov-io/iso8583 v0.13.0/go.mod h1:Ul1q5ztEUGpFCw3I+bp1HRHBKymgfBTBiKa0JhdeaAM=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -162,6 +164,8 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
 google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=