diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index a81d9ac31..932ea8b8b 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -18,3 +18,4 @@
 -keep class org.koitharu.kotatsu.core.exceptions.* { *; }
 -keep class org.koitharu.kotatsu.settings.NotificationSettingsLegacyFragment
 -keep class org.koitharu.kotatsu.core.prefs.ScreenshotsPolicy { *; }
+-keep class org.koitharu.kotatsu.settings.backup.PeriodicalBackupSettingsFragment { *; }