diff --git a/_templates/cloudflare/worker-go/go.mod b/_templates/cloudflare/worker-go/go.mod
new file mode 100644
index 0000000..762980b
--- /dev/null
+++ b/_templates/cloudflare/worker-go/go.mod
@@ -0,0 +1,3 @@
+module github.com/syumai/workers/_templates/cloudflare/worker-go
+
+go 1.21.1
diff --git a/_templates/cloudflare/worker-tinygo/go.mod b/_templates/cloudflare/worker-tinygo/go.mod
new file mode 100644
index 0000000..d8848fb
--- /dev/null
+++ b/_templates/cloudflare/worker-tinygo/go.mod
@@ -0,0 +1,3 @@
+module github.com/syumai/workers/_templates/cloudflare/worker-tinygo
+
+go 1.21.1