diff --git a/Gopkg.lock b/Gopkg.lock
index d773b4d7a..f474e7756 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -277,8 +277,8 @@
 [[projects]]
   name = "github.com/tendermint/go-amino"
   packages = ["."]
-  revision = "3668c02a8feace009f80754a5e5a8541e5d7b996"
-  version = "0.9.8"
+  revision = "ed62928576cfcaf887209dc96142cd79cdfff389"
+  version = "0.9.9"
 
 [[projects]]
   name = "github.com/tendermint/go-crypto"
@@ -460,6 +460,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "48f831a7ccc2c0fd3b790c16ca99ec864b89253d087ff4190d821c01c13e635a"
+  inputs-digest = "fad966346d3b6042faf2bf793168b6ce9a8ff59ae207b7ad57008ead0f3ff7d4"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 1e71e68e2..d2d4ee2ff 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -62,7 +62,7 @@
 
 [[constraint]]
   name = "github.com/tendermint/go-amino"
-  version = "~0.9.8"
+  version = "~0.9.9"
 
 [[constraint]]
   name = "github.com/tendermint/iavl"
diff --git a/types/rational.go b/types/rational.go
index 550c96825..7e0a09107 100644
--- a/types/rational.go
+++ b/types/rational.go
@@ -1,7 +1,6 @@
 package types
 
 import (
-	"bytes"
 	"fmt"
 	"math/big"
 	"strconv"
@@ -153,26 +152,16 @@ func (r Rat) ToLeftPadded(totalDigits int8) string {
 
 //___________________________________________________________________________________
 
-//Wraps r.MarshalText() in quotes to make it a valid JSON string.
-func (r Rat) MarshalJSON() ([]byte, error) {
+//Wraps r.MarshalText().
+func (r Rat) MarshalAmino() (string, error) {
 	bz, err := (&(r.Rat)).MarshalText()
-	if err != nil {
-		return nil, err
-	}
-	return []byte(fmt.Sprintf("\"%s\"", bz)), nil
+	return string(bz), err
 }
 
 // Requires a valid JSON string - strings quotes and calls UnmarshalText
-func (r *Rat) UnmarshalJSON(data []byte) (err error) {
-	quote := []byte(`"`)
-	if len(data) < 2 ||
-		!bytes.HasPrefix(data, quote) ||
-		!bytes.HasSuffix(data, quote) {
-		return fmt.Errorf("JSON encoded Rat must be a quote-delimitted string, have %v", string(data))
-	}
-	data = bytes.Trim(data, `"`)
+func (r *Rat) UnmarshalAmino(text string) (err error) {
 	tempRat := big.NewRat(0, 1)
-	err = tempRat.UnmarshalText(data)
+	err = tempRat.UnmarshalText([]byte(text))
 	if err != nil {
 		return err
 	}
diff --git a/types/rational_test.go b/types/rational_test.go
index 39207034c..a69c94195 100644
--- a/types/rational_test.go
+++ b/types/rational_test.go
@@ -235,7 +235,7 @@ func TestSerializationText(t *testing.T) {
 	assert.True(t, r.Equal(r2), "original: %v, unmarshalled: %v", r, r2)
 }
 
-func TestSerializationGoWire(t *testing.T) {
+func TestSerializationGoWireJSON(t *testing.T) {
 	r := NewRat(1, 3)
 	bz, err := cdc.MarshalJSON(r)
 	require.NoError(t, err)
@@ -246,6 +246,17 @@ func TestSerializationGoWire(t *testing.T) {
 	assert.True(t, r.Equal(r2), "original: %v, unmarshalled: %v", r, r2)
 }
 
+func TestSerializationGoWireBinary(t *testing.T) {
+	r := NewRat(1, 3)
+	bz, err := cdc.MarshalBinary(r)
+	require.NoError(t, err)
+
+	r2 := NewRat(0, 1)
+	err = cdc.UnmarshalBinary(bz, &r2)
+	require.NoError(t, err)
+	assert.True(t, r.Equal(r2), "original: %v, unmarshalled: %v", r, r2)
+}
+
 type testEmbedStruct struct {
 	Field1 string `json:"f1"`
 	Field2 int    `json:"f2"`