diff --git a/app/Services/Wireguard/QrCode.php b/app/Services/Wireguard/QrCode.php
index 6d04576..e328754 100644
--- a/app/Services/Wireguard/QrCode.php
+++ b/app/Services/Wireguard/QrCode.php
@@ -21,7 +21,9 @@ final class QrCode
         // against a screen — more redundancy would only make the code denser.
         $matrix = Encoder::encode($text, ErrorCorrectionLevel::L())->getMatrix();
         $width = $matrix->getWidth();
-        $quiet = 2;
+        // Four modules is the specified minimum quiet zone. Less than that and
+        // some readers fail to find the symbol at all against a bordered card.
+        $quiet = 4;
         $total = $width + 2 * $quiet;
 
         $cells = '';