diff --git a/config.json b/config.json
new file mode 100644
index 0000000..eedf3f0
--- /dev/null
+++ b/config.json
@@ -0,0 +1,6 @@
+{
+  "host": ":3125",
+  "servedirs": {
+    "leech": "/home/ontake/Dev/go/leech"
+  }
+}
diff --git a/config/config.go b/config/config.go
index f236258..fc48851 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1,7 +1,37 @@
 package config
 
-var Host = ":3125"
+import (
+	"encoding/json"
+	"log"
+	"os"
+	"path/filepath"
+)
 
-var ServeDirs = map[string]string{
-	"leech": "/home/ontake/Dev/go/leech",
+type ConfigS struct {
+	Host      string            `json:"host"`
+	ServeDirs map[string]string `json:"servedirs"`
+}
+
+var Config ConfigS
+
+func Init() {
+	chosenConfigPath := "/etc/leech/"
+
+	// Deal with a JSON configuration file in that folder.
+	configFile := filepath.Join(chosenConfigPath, "config.json")
+
+	// Does the file not exist?
+	if _, err := os.Stat(configFile); os.IsNotExist(err) {
+		log.Fatal("config file couldn't be found")
+	} else {
+		// Load the existing file.
+		fh, err := os.Open(configFile)
+		if err != nil {
+			panic(err)
+		}
+		defer fh.Close()
+
+		decoder := json.NewDecoder(fh)
+		decoder.Decode(&Config)
+	}
 }
diff --git a/leech b/leech
index 51cb351..0c95f6c 100755
Binary files a/leech and b/leech differ
diff --git a/main.go b/main.go
index c717fda..6c37067 100644
--- a/main.go
+++ b/main.go
@@ -15,6 +15,7 @@ import (
 var assetsEmbed embed.FS
 
 func main() {
+	config.Init()
 	app := fiber.New()
 	app.Use(logger.New(logger.Config{
 		Format: "[${ip}]:${port} ${status} - ${method} ${path}\n",
@@ -28,9 +29,9 @@ func main() {
 		Browse:     true,
 	}))
 
-	for dirName, dirToServe := range config.ServeDirs {
+	for dirName, dirToServe := range config.Config.ServeDirs {
 		app.Static("/serve/"+dirName, dirToServe)
 	}
 
-	app.Listen(config.Host)
+	app.Listen(config.Config.Host)
 }
diff --git a/route/route.go b/route/route.go
index 7dbdc62..2de0f0e 100644
--- a/route/route.go
+++ b/route/route.go
@@ -16,15 +16,15 @@ func HandleList(c *fiber.Ctx) error {
 	req := c.Params("req")
 	c.Set(fiber.HeaderContentType, fiber.MIMETextHTML)
 	if req == "" {
-		keys := make([]string, 0, len(config.ServeDirs))
-		for k := range config.ServeDirs {
+		keys := make([]string, 0, len(config.Config.ServeDirs))
+		for k := range config.Config.ServeDirs {
 			keys = append(keys, k)
 		}
 		sort.Slice(keys, func(i, j int) bool {
 			return i < j
 		})
 
-		entries := make([]html.Entry, 0, len(config.ServeDirs))
+		entries := make([]html.Entry, 0, len(config.Config.ServeDirs))
 		for _, key := range keys {
 			entries = append(entries, html.Entry{
 				Name:  key,
@@ -36,7 +36,7 @@ func HandleList(c *fiber.Ctx) error {
 		return c.SendString(html.FileListPage(req, entries))
 	} else {
 		pathSlice := strings.Split(req, ".")
-		pathBase, ok := config.ServeDirs[pathSlice[0]]
+		pathBase, ok := config.Config.ServeDirs[pathSlice[0]]
 		if ok {
 			pathSlice[0] = pathBase
 			completePath := path.Join(pathSlice...)