diff --git a/SECURITY.md b/SECURITY.md
index 7f8a58b996..79f19f17a9 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -2,4 +2,4 @@
 
 ## Reporting a Vulnerability
 
-See [golang.org/security](https://golang.org/security) to report a vulnerability.
+Search [golang.org/security](https://golang.org/security) to report a vulnerability.
diff --git a/codereview.cfg b/codereview.cfg
index 7b02dc6633..8e436a4a97 100644
--- a/codereview.cfg
+++ b/codereview.cfg
@@ -1 +1,2 @@
 issuerepo: golang/vscode-go
+branch: vscgo-module-v0.0.1-deprecated
diff --git a/vscgo/go.mod b/vscgo/go.mod
new file mode 100644
index 0000000000..f8b89458ee
--- /dev/null
+++ b/vscgo/go.mod
@@ -0,0 +1,5 @@
+module github.com/golang/vscode-go/vscgo
+
+go 1.20
+
+retract [v0.0.0-0, v0.0.1-deprecated]
diff --git a/vscgo/main.go b/vscgo/main.go
index ab69ba7f0f..95ef0514e5 100644
--- a/vscgo/main.go
+++ b/vscgo/main.go
@@ -1,4 +1,4 @@
-// Copyright 2024 The Go Authors. All rights reserved.
+// Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
@@ -7,8 +7,12 @@
 // the extension is first activated.
 package main
 
-import "github.com/golang/vscode-go/internal/vscgo"
+import (
+	"fmt"
+	"os"
+)
 
 func main() {
-	vscgo.Main()
+	fmt.Fprintln(os.Stderr, "This is a deprecated version of vscgo. Please reinstall:")
+	fmt.Fprintln(os.Stderr, "  go install github.com/golang/vscode-go/vscgo@latest")
 }