diff --git a/cloud.go b/cloud.go
index cec749e..59adb61 100644
--- a/cloud.go
+++ b/cloud.go
@@ -223,6 +223,7 @@ func handleCloudRegister(c *gin.Context) {
 		return
 	}
 	apiReq.Header.Set("Content-Type", "application/json")
+	apiReq.Header.Set("User-Agent", httpUserAgent)
 
 	apiResp, err := client.Do(apiReq)
 	if err != nil {
@@ -537,6 +538,8 @@ func rpcDeregisterDevice() error {
 	}
 
 	req.Header.Set("Authorization", "Bearer "+config.CloudToken)
+	req.Header.Set("User-Agent", httpUserAgent)
+
 	client := &http.Client{Timeout: CloudAPIRequestTimeout}
 	resp, err := client.Do(req)
 	if err != nil {
diff --git a/internal/timesync/http.go b/internal/timesync/http.go
index 3a51463..36974b8 100644
--- a/internal/timesync/http.go
+++ b/internal/timesync/http.go
@@ -57,6 +57,7 @@ func (t *TimeSync) queryMultipleHttp(urls []string, timeout time.Duration) (now
 				ctx,
 				url,
 				timeout,
+				t.httpUserAgent,
 			)
 			duration := time.Since(startTime)
 
@@ -111,6 +112,7 @@ func queryHttpTime(
 	ctx context.Context,
 	url string,
 	timeout time.Duration,
+	httpUserAgent string,
 ) (now *time.Time, response *http.Response, err error) {
 	client := http.Client{
 		Timeout: timeout,
@@ -119,6 +121,10 @@ func queryHttpTime(
 	if err != nil {
 		return nil, nil, err
 	}
+	if httpUserAgent != "" {
+		req.Header.Set("User-Agent", httpUserAgent)
+	}
+
 	resp, err := client.Do(req)
 	if err != nil {
 		return nil, nil, err
diff --git a/internal/timesync/timesync.go b/internal/timesync/timesync.go
index e956cf9..2d55fdf 100644
--- a/internal/timesync/timesync.go
+++ b/internal/timesync/timesync.go
@@ -32,6 +32,8 @@ type TimeSync struct {
 	httpUrls      []string
 	networkConfig *network.NetworkConfig
 
+	httpUserAgent string
+
 	rtcDevicePath string
 	rtcDevice     *os.File //nolint:unused
 	rtcLock       *sync.Mutex
@@ -45,6 +47,7 @@ type TimeSyncOptions struct {
 	PreCheckFunc  func() (bool, error)
 	Logger        *zerolog.Logger
 	NetworkConfig *network.NetworkConfig
+	HttpUserAgent string
 }
 
 type SyncMode struct {
@@ -71,6 +74,7 @@ func NewTimeSync(opts *TimeSyncOptions) *TimeSync {
 		preCheckFunc:  opts.PreCheckFunc,
 		ntpServers:    defaultNTPServers,
 		httpUrls:      defaultHTTPUrls,
+		httpUserAgent: opts.HttpUserAgent,
 		networkConfig: opts.NetworkConfig,
 	}
 
diff --git a/main.go b/main.go
index c25d8b8..e150c95 100644
--- a/main.go
+++ b/main.go
@@ -2,6 +2,7 @@ package kvm
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 	"os"
 	"os/signal"
@@ -12,6 +13,7 @@ import (
 )
 
 var appCtx context.Context
+var httpUserAgent string = fmt.Sprintf("jetkvm-app/%s", builtAppVersion)
 
 func Main() {
 	LoadConfig()
@@ -25,6 +27,8 @@ func Main() {
 		logger.Warn().Err(err).Msg("failed to get local version")
 	}
 
+	httpUserAgent = fmt.Sprintf("jetkvm-app/%s jetkvm-system/%s", appVersionLocal, systemVersionLocal)
+
 	logger.Info().
 		Interface("system_version", systemVersionLocal).
 		Interface("app_version", appVersionLocal).
diff --git a/ota.go b/ota.go
index cf97cc0..2feee62 100644
--- a/ota.go
+++ b/ota.go
@@ -88,6 +88,7 @@ func fetchUpdateMetadata(ctx context.Context, deviceId string, includePreRelease
 	if err != nil {
 		return nil, fmt.Errorf("error creating request: %w", err)
 	}
+	req.Header.Set("User-Agent", httpUserAgent)
 
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
@@ -131,7 +132,7 @@ func downloadFile(ctx context.Context, path string, url string, downloadProgress
 	if err != nil {
 		return fmt.Errorf("error creating request: %w", err)
 	}
-
+	req.Header.Set("User-Agent", httpUserAgent)
 	client := http.Client{
 		Timeout: 10 * time.Minute,
 		Transport: &http.Transport{