diff --git a/index.php b/index.php
index d15ae621..4c00611f 100644
--- a/index.php
+++ b/index.php
@@ -21,7 +21,6 @@
  *
  */
 
-
 class UpdateException extends \Exception {
 	protected $data;
 
@@ -167,6 +166,11 @@ public function checkForUpdate() {
 		$versionString = isset($response['versionstring']) ? $response['versionstring'] : '';
 
 		if ($version !== '' && $version !== $this->currentVersion) {
+			if (PHP_INT_SIZE < 8 && version_compare($version, '26.0.0.0', '>=')) {
+				$this->updateAvailable = false;
+				$updateText = '<br />You are running a 32-bit system. Nextcloud 26 supports 64-bit only, therefore an update cannot be offered. Please switch to a 64-bit system first.';
+				return $updateText;
+			}
 			$this->updateAvailable = true;
 			$releaseChannel = $this->getCurrentReleaseChannel();
 			$updateText = 'Update to ' . htmlentities($versionString) . ' available. (channel: "' . htmlentities($releaseChannel) . '")<br /><span class="light">Following file will be downloaded automatically:</span> <code class="light">' . $response['url'] . '</code>';
diff --git a/lib/Updater.php b/lib/Updater.php
index 59614b6c..82083750 100644
--- a/lib/Updater.php
+++ b/lib/Updater.php
@@ -137,6 +137,11 @@ public function checkForUpdate() {
 		$versionString = isset($response['versionstring']) ? $response['versionstring'] : '';
 
 		if ($version !== '' && $version !== $this->currentVersion) {
+			if (PHP_INT_SIZE < 8 && version_compare($version, '26.0.0.0', '>=')) {
+				$this->updateAvailable = false;
+				$updateText = '<br />You are running a 32-bit system. Nextcloud 26 supports 64-bit only, therefore an update cannot be offered. Please switch to a 64-bit system first.';
+				return $updateText;
+			}
 			$this->updateAvailable = true;
 			$releaseChannel = $this->getCurrentReleaseChannel();
 			$updateText = 'Update to ' . htmlentities($versionString) . ' available. (channel: "' . htmlentities($releaseChannel) . '")<br /><span class="light">Following file will be downloaded automatically:</span> <code class="light">' . $response['url'] . '</code>';
diff --git a/updater.phar b/updater.phar
index 9d5b87f7..cbf662b5 100755
Binary files a/updater.phar and b/updater.phar differ