diff --git a/lib/os/class.ISPConfigDebian10OS.inc.php b/lib/os/class.ISPConfigDebian10OS.inc.php
index 68861ae542ba6498d39a40a75412d62675e69e30..cbeb262acc5756513bc5544ef0a8bd4beecf32af 100644
--- a/lib/os/class.ISPConfigDebian10OS.inc.php
+++ b/lib/os/class.ISPConfigDebian10OS.inc.php
@@ -90,6 +90,7 @@ class ISPConfigDebian10OS extends ISPConfigDebianOS {
 
 	protected function installRoundcube($mysql_root_pw) {
 		$this->addBusterBackportsRepo();
+		$this->updatePackageList();
 		parent::installRoundcube($mysql_root_pw);
 	}