diff --git a/plugins/Toolbox/src/Toolbox.py b/plugins/Toolbox/src/Toolbox.py
index a2a5b5fc34..718a205aa2 100644
--- a/plugins/Toolbox/src/Toolbox.py
+++ b/plugins/Toolbox/src/Toolbox.py
@@ -301,7 +301,12 @@ class Toolbox(QObject, Extension):
         Logger.log("i", "Toolbox: Attempting to download & install package from %s.", url)
         url = QUrl(url)
         self._download_request = QNetworkRequest(url)
-        self._download_request.setAttribute(QNetworkRequest.FollowRedirectsAttribute, True)
+        if hasattr(QNetworkRequest, "FollowRedirectsAttribute"):
+            # Patch for Qt 5.6-5.8
+            self._download_request.setAttribute(QNetworkRequest.FollowRedirectsAttribute, True)
+        if hasattr(QNetworkRequest, "RedirectPolicyAttribute"):
+            # Patch for Qt 5.9+
+            self._download_request.setAttribute(QNetworkRequest.RedirectPolicyAttribute, True)
         self._download_request.setRawHeader(*self._request_header)
         self._download_reply = self._network_manager.get(self._download_request)
         self.setDownloadProgress(0)