diff --git a/build.py b/build.py
index 3a93ff6..b8c49fc 100644
--- a/build.py
+++ b/build.py
@@ -26,9 +26,13 @@ PLATFORMS = [
 ]
 
 platform_filter = ""
+arch_filter = ""
 if len(sys.argv) > 1:
     platform_filter = sys.argv[1]
 
+if len(sys.argv) > 2:
+    arch_filter = sys.argv[2]
+
 if os.path.exists("./tmp"):
     shutil.rmtree("./tmp")
 os.mkdir("./tmp")
@@ -44,6 +48,9 @@ os.mkdir("./updates")
 for (platform_name, archs, ext) in PLATFORMS:
     if platform_filter and platform_filter != platform_name:
         continue
+    archs = [a for a in archs if arch_filter == "" or a == arch_filter]
+    if len(archs) == 0:
+        continue
     for GUI in [False, True]:
         print(f"Building {platform_name} gui: {GUI}")
         SUB1 = '-gui' if GUI else ''
diff --git a/utils/updater.go b/utils/updater.go
index 5f71f94..64cdd27 100644
--- a/utils/updater.go
+++ b/utils/updater.go
@@ -1,6 +1,12 @@
 package utils
 
 import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"runtime"
+
 	"github.com/sanbornm/go-selfupdate/selfupdate"
 )
 
@@ -9,10 +15,36 @@ var CmdName = "bedrocktool"
 
 const updateServer = "https://updates.yuv.pink/"
 
+type trequester struct {
+	selfupdate.Requester
+}
+
+func (httpRequester *trequester) Fetch(url string) (io.ReadCloser, error) {
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	// set user agent to know what versions are run
+	h, _ := os.Hostname()
+	req.Header.Add("User-Agent", fmt.Sprintf("%s %s '%s' %d", CmdName, Version, h, runtime.NumCPU()))
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != 200 {
+		return nil, fmt.Errorf("bad http status from %s: %v", url, resp.Status)
+	}
+
+	return resp.Body, nil
+}
+
 var Updater = &selfupdate.Updater{
 	CurrentVersion: Version,
 	ApiURL:         updateServer,
 	BinURL:         updateServer,
 	Dir:            "update/",
 	CmdName:        CmdName,
+	Requester:      &trequester{},
 }