diff --git a/cmd/checkboundaryrelease/main.go b/cmd/checkboundaryrelease/main.go
new file mode 100644
index 0000000..0b77f89
--- /dev/null
+++ b/cmd/checkboundaryrelease/main.go
@@ -0,0 +1,56 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/ringsaturn/requests"
+	tzfrel "github.com/ringsaturn/tzf-rel"
+	"github.com/ringsaturn/tzf/pb"
+	"google.golang.org/protobuf/proto"
+)
+
+const API = "https://api.github.com/repos/evansiroky/timezone-boundary-builder/tags"
+
+type TagsResponseItem struct {
+	Name   string `json:"name"`
+	Commit Commit `json:"commit"`
+	// ZipballURL string `json:"zipball_url"`
+	// TarballURL string `json:"tarball_url"`
+	// NodeID     string `json:"node_id"`
+}
+
+type Commit struct {
+	Sha string `json:"sha"`
+	URL string `json:"url"`
+}
+
+func main() {
+	verbose := flag.Bool("verbose", false, "show more logs")
+	flag.Parse()
+	ctx := context.Background()
+	resp := []*TagsResponseItem{}
+	err := requests.ReqWithExpectJSONResponse(ctx, http.DefaultClient, "GET", API, nil, &resp)
+	if err != nil {
+		panic(err)
+	}
+	latestTag := resp[0].Name
+
+	input := &pb.PreindexTimezones{}
+	if err := proto.Unmarshal(tzfrel.PreindexData, input); err != nil {
+		panic(err)
+	}
+	if *verbose {
+		log.Printf("input.Version=%v, latestTag=%v\n", input.Version, latestTag)
+	}
+	if input.Version == latestTag {
+		log.Println("Same version, bye!")
+		os.Exit(1)
+		return
+	}
+	fmt.Printf("TIMEZONE_BOUNDARY_VERSION=%s\n", latestTag)
+}
diff --git a/go.mod b/go.mod
index c7e57d8..7ae2643 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/paulmach/orb v0.9.0
 	github.com/ringsaturn/go-cities.json v0.3.5
 	github.com/ringsaturn/polyf v0.0.0-20221203140730-bfa046f8af27
+	github.com/ringsaturn/requests v0.1.0
 	github.com/ringsaturn/tzf-rel v0.0.2023-b
 	github.com/tidwall/geojson v1.4.3
 	github.com/tidwall/lotsa v1.0.3
diff --git a/go.sum b/go.sum
index a3dec32..8db34a6 100644
--- a/go.sum
+++ b/go.sum
@@ -29,8 +29,8 @@ github.com/ringsaturn/go-cities.json v0.3.5 h1:MCRHTdXyXwh6EVbHp17otHrktDulK0Vu/
 github.com/ringsaturn/go-cities.json v0.3.5/go.mod h1:qpTYJsvNi40oTJs0WEdRdNAbWcLBWSL7oRHUxMrF4g8=
 github.com/ringsaturn/polyf v0.0.0-20221203140730-bfa046f8af27 h1:zKR4J+B+Aayd3ib6Y0BGuLqjJQCRlF2yVoA1RiDrUrU=
 github.com/ringsaturn/polyf v0.0.0-20221203140730-bfa046f8af27/go.mod h1:+oMllvWOIIjXhH69ceZhEAXfA7kmfo75wIJoC3MRsa4=
-github.com/ringsaturn/tzf-rel v0.0.2022-g1.0.20230326130439-db41fe04bde9 h1:JtA4RtC2VSboRyO3w/aEwX1jU/T9Y/AB95t73GGXoK8=
-github.com/ringsaturn/tzf-rel v0.0.2022-g1.0.20230326130439-db41fe04bde9/go.mod h1:TvyUIUpF3aCH98QYjTmMb1cqK7pFswdFLoIVZwGNV/M=
+github.com/ringsaturn/requests v0.1.0 h1:3W152Lc80Man+V7AoeZamKhUiZEKuHZVfPWdzdVNJkM=
+github.com/ringsaturn/requests v0.1.0/go.mod h1:dq7MKwNyXr9AKHdNvUlpguFE9TJSdjdsAqN3NTQfsuI=
 github.com/ringsaturn/tzf-rel v0.0.2023-b h1:27Kt3ewlXJ/nkYFedYWmKbj7CUWzG0UxFYXQAjzPgBE=
 github.com/ringsaturn/tzf-rel v0.0.2023-b/go.mod h1:TvyUIUpF3aCH98QYjTmMb1cqK7pFswdFLoIVZwGNV/M=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=