diff --git a/plugin/source/dynamix.unraid.net/usr/local/emhttp/plugins/dynamix.plugin.manager/Downgrade.page b/plugin/source/dynamix.unraid.net/usr/local/emhttp/plugins/dynamix.plugin.manager/Downgrade.page
index 87e8b639ec..2624bd4024 100644
--- a/plugin/source/dynamix.unraid.net/usr/local/emhttp/plugins/dynamix.plugin.manager/Downgrade.page
+++ b/plugin/source/dynamix.unraid.net/usr/local/emhttp/plugins/dynamix.plugin.manager/Downgrade.page
@@ -114,18 +114,44 @@ function cleanupDiagnostics() {
   setTimeout(cleanupDiagnostics, 2000);
 }
 
+function reportDowngradeError(xhr) {
+  $('div.spinner').hide('slow');
+
+  const response = xhr && xhr.responseJSON;
+  const message = response && response.error
+    ? response.error
+    : "_(Unable to complete the downgrade. Please try again.)_";
+
+  swal({
+    title: "_(Downgrade failed)_",
+    text: message,
+    type: 'error',
+    confirmButtonText: "_(Ok)_",
+  });
+}
+
 function startDowngrade() {
   $('div.spinner').show('slow');
 
-  $.get(
+  $.post(
     '/plugins/dynamix.plugin.manager/include/Downgrade.php',
-    {
-      version: '<?= $rebootDetails->previousVersion ?>',
+    { action: 'prepare' },
+    function(prepareResponse) {
+      $.post(
+        '/plugins/dynamix.plugin.manager/include/Downgrade.php',
+        {
+          nonce: prepareResponse.nonce,
+          confirm: 'yes',
+          version: '<?= $rebootDetails->previousVersion ?>',
+        },
+        function() {
+          refresh();
+        },
+        'json'
+      ).fail(reportDowngradeError);
     },
-    function() {
-      refresh();
-    }
-  );
+    'json'
+  ).fail(reportDowngradeError);
 }
 
 function confirmDowngrade() {