diff --git a/backend/wireguard/log.go b/backend/wireguard/log.go
index 01093c4..2b55fa5 100644
--- a/backend/wireguard/log.go
+++ b/backend/wireguard/log.go
@@ -8,7 +8,7 @@ import (
 type logSeverity string
 
 const (
-	wireGuardLogTimestampFormat = "2006/01/02 15:04:05.000000"
+	wireGuardLogTimestampFormat = "2006/01/02 15:04:05"
 
 	logSeverityInfo    logSeverity = "Info"
 	logSeverityWarning logSeverity = "Warning"
@@ -16,7 +16,7 @@ const (
 )
 
 func formatWireGuardLogLine(severity logSeverity, message string) string {
-	timestamp := time.Now().Format(wireGuardLogTimestampFormat)
+	timestamp := time.Now().UTC().Format(wireGuardLogTimestampFormat)
 	return fmt.Sprintf("%s [%s] %s", timestamp, severity, message)
 }
 
diff --git a/backend/wireguard/wireguard_lifecycle_test.go b/backend/wireguard/wireguard_lifecycle_test.go
index 0dae9cc..b7dd2d6 100644
--- a/backend/wireguard/wireguard_lifecycle_test.go
+++ b/backend/wireguard/wireguard_lifecycle_test.go
@@ -163,7 +163,7 @@ func TestWireGuardNewInitializesWithSingleConfigureCallIncludingPeers(t *testing
 
 	select {
 	case startupLog := <-wg.Logs():
-		pattern := regexp.MustCompile(`^\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2}\.\d{6} \[Info\] WireGuard interface wg-test initialized successfully$`)
+		pattern := regexp.MustCompile(`^\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2} \[Info\] WireGuard interface wg-test initialized successfully$`)
 		if !pattern.MatchString(startupLog) {
 			t.Fatalf("expected startup log with timestamp prefix, got %q", startupLog)
 		}