diff --git a/go.mod b/go.mod
index a554604..ffbc4c7 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/caiyunapp/oap
 go 1.20
 
 require (
+	github.com/pelletier/go-toml/v2 v2.1.1
 	github.com/philchia/agollo/v4 v4.1.5
 	github.com/stretchr/testify v1.8.4
 	go.uber.org/mock v0.3.0
diff --git a/go.sum b/go.sum
index 288ed08..af52442 100644
--- a/go.sum
+++ b/go.sum
@@ -1,14 +1,23 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pelletier/go-toml/v2 v2.1.1 h1:LWAJwfNvjQZCFIDKWYQaM62NcYeYViCmWIwmOStowAI=
+github.com/pelletier/go-toml/v2 v2.1.1/go.mod h1:tJU2Z3ZkXwnxa4DPO899bsyIoywizdUvyaeZurnPPDc=
 github.com/philchia/agollo/v4 v4.1.5 h1:6FyH9ex5CKPCNyNyuXvOx2yKN5lWRT0sUu2lpSTmleE=
 github.com/philchia/agollo/v4 v4.1.5/go.mod h1:SBdQmfqqu/XCWJ1MDzYcCL3X+p3VJ+uQBy0nxxqjexg=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 go.uber.org/mock v0.3.0 h1:3mUxI1No2/60yUYax92Pt8eNOEecx2D3lcXZh2NEZJo=
 go.uber.org/mock v0.3.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/oap.go b/oap.go
index 1ac3850..2efb77f 100644
--- a/oap.go
+++ b/oap.go
@@ -1,5 +1,6 @@
 // Package oap is a library for loading Apollo configuration into a struct.
-// It supports JSON and YAML format. You can also use custom unmarshal for struct type filed.
+// It supports JSON/YAML/TOML format.
+// You can also use custom unmarshal for struct type filed.
 package oap
 
 import (
@@ -8,6 +9,7 @@ import (
 	"reflect"
 	"strings"
 
+	"github.com/pelletier/go-toml/v2"
 	"github.com/philchia/agollo/v4"
 	"gopkg.in/yaml.v3"
 )
@@ -22,10 +24,11 @@ type UnmarshalFunc func([]byte, interface{}) error
 var registryForUnmarshal = map[string]UnmarshalFunc{
 	"json": json.Unmarshal,
 	"yaml": yaml.Unmarshal,
+	"toml": toml.Unmarshal,
 }
 
 // You can use custom unmarshal for struct type filed.
-// Package oap provides built-in support for JSON&YAML.
+// Package oap provides built-in support for JSON/YAML/TOML.
 func SetUnmarshalFunc(name string, f UnmarshalFunc) {
 	registryForUnmarshal[name] = f
 }
diff --git a/oap_test.go b/oap_test.go
index d2efe03..6e116a3 100644
--- a/oap_test.go
+++ b/oap_test.go
@@ -297,3 +297,28 @@ func ExampleDecode() {
 
 	fmt.Println(config.Foo)
 }
+
+func TestDecodeTOMLStruct(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	type user struct {
+		Name string `toml:"name"`
+		Age  int    `toml:"age"`
+	}
+
+	config := struct {
+		User    user  `apollo:"user,toml"`
+		UserPtr *user `apollo:"user_ptr,toml"`
+	}{}
+
+	client := NewMockClient(ctrl)
+	client.EXPECT().GetString(gomock.Eq("user")).Return("name = \"Alice\"\nage = 18")
+	client.EXPECT().GetString(gomock.Eq("user_ptr")).Return("name = \"Alice\"\nage = 18")
+
+	err := oap.Decode(&config, client, make(map[string][]agollo.OpOption))
+	require.NoError(t, err)
+
+	assert.Equal(t, user{Name: "Alice", Age: 18}, config.User)
+	assert.Equal(t, &user{Name: "Alice", Age: 18}, config.UserPtr)
+}