diff --git a/src/webui/webapplication.cpp b/src/webui/webapplication.cpp
index 65331f1ea..6a339d159 100644
--- a/src/webui/webapplication.cpp
+++ b/src/webui/webapplication.cpp
@@ -744,12 +744,11 @@ void WebApplication::sessionStart()
     cookie.setHttpOnly(true);
     cookie.setSecure(m_isSecureCookieEnabled && m_isHttpsEnabled);
     cookie.setPath(u"/"_s);
-    QByteArray cookieRawForm = cookie.toRawForm();
     if (m_isCSRFProtectionEnabled)
-        cookieRawForm.append("; SameSite=Strict");
+        cookie.setSameSitePolicy(QNetworkCookie::SameSite::Strict);
     else if (cookie.isSecure())
-        cookieRawForm.append("; SameSite=None");
-    setHeader({Http::HEADER_SET_COOKIE, QString::fromLatin1(cookieRawForm)});
+        cookie.setSameSitePolicy(QNetworkCookie::SameSite::None);
+    setHeader({Http::HEADER_SET_COOKIE, QString::fromLatin1(cookie.toRawForm())});
 }
 
 void WebApplication::sessionEnd()