diff --git a/repochecker/update.go b/repochecker/update.go
new file mode 100644
index 00000000..9e51dd32
--- /dev/null
+++ b/repochecker/update.go
@@ -0,0 +1,31 @@
+// +build checkupdate
+
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"net/http"
+)
+
+const version = 0
+
+func init() {
+	go checkUpdate()
+}
+
+func checkUpdate() {
+	res, err := http.Get("https://srs.nemunai.re/repochecker.version")
+	if err == nil {
+		defer res.Body.Close()
+		dec := json.NewDecoder(res.Body)
+
+		var v int
+		if err := dec.Decode(&v); err == io.EOF || err == nil {
+			if v > version {
+				log.Println("Your repochecker version is outdated, please update it:\n    wget https://srs.nemunai.re/repochecker")
+			}
+		}
+	}
+}