diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..dfe88e5
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module goproxy.daisukide.com/ivampiresp/common
+
+go 1.21.3
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..c92ebbb
--- /dev/null
+++ b/main.go
@@ -0,0 +1,5 @@
+package main
+
+func SayHello() {
+	println("Hello World!")
+}