diff --git a/defaults.go b/defaults.go
index 42d8198..f6d650a 100644
--- a/defaults.go
+++ b/defaults.go
@@ -4,9 +4,10 @@
 package main
 
 import (
-	"encoding/json"
 	"fmt"
 	"os"
+
+	"github.com/pelletier/go-toml/v2"
 )
 
 var cmdDefaults = &Command{
@@ -26,7 +27,7 @@ func runDefaults(args []string) error {
 }
 
 func writeConfig(c *userConfig) error {
-	b, err := json.MarshalIndent(c, "", "\t")
+	b, err := toml.Marshal(c)
 	if err != nil {
 		return fmt.Errorf("cannot encode config: %v", err)
 	}
diff --git a/go.mod b/go.mod
index f68270e..38507a5 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,8 @@
 module mvdan.cc/fdroidcl
 
-go 1.19
+go 1.21.0
+
+toolchain go1.23.0
 
 require (
 	github.com/kr/pretty v0.3.1
@@ -12,6 +14,7 @@ require (
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
 	github.com/rivo/uniseg v0.4.4 // indirect
 	golang.org/x/sys v0.12.0 // indirect
 	golang.org/x/term v0.12.0 // indirect
diff --git a/go.sum b/go.sum
index 362e9f9..f6cf6a7 100644
--- a/go.sum
+++ b/go.sum
@@ -13,6 +13,8 @@ github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZ
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
 github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
+github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M=
+github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
diff --git a/main.go b/main.go
index 582ec9c..89cd38c 100644
--- a/main.go
+++ b/main.go
@@ -4,12 +4,13 @@
 package main
 
 import (
-	"encoding/json"
 	"flag"
 	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
+
+	"github.com/pelletier/go-toml/v2"
 )
 
 const cmdName = "fdroidcl"
@@ -43,17 +44,17 @@ func mustData() string {
 }
 
 func configPath() string {
-	return filepath.Join(mustData(), "config.json")
+	return filepath.Join(mustData(), "config.toml")
 }
 
 type repo struct {
-	ID      string `json:"id"`
-	URL     string `json:"url"`
-	Enabled bool   `json:"enabled"`
+	ID      string `toml:"id"`
+	URL     string `toml:"url"`
+	Enabled bool   `toml:"enabled"`
 }
 
 type userConfig struct {
-	Repos []repo `json:"repos"`
+	Repos []repo `toml:"repos"`
 }
 
 var config = userConfig{
@@ -79,7 +80,7 @@ func readConfig() error {
 	}
 	defer f.Close()
 	fileConfig := userConfig{}
-	err = json.NewDecoder(f).Decode(&fileConfig)
+	err = toml.NewDecoder(f).Decode(&fileConfig)
 	if err != nil {
 		return err
 	}