diff --git a/app/proguard/app.pro b/app/proguard/app.pro
index cad3fa17..78042702 100644
--- a/app/proguard/app.pro
+++ b/app/proguard/app.pro
@@ -24,6 +24,7 @@
 -keep class pl.szczodrzynski.edziennik.utils.models.** { *; }
 -keep class pl.szczodrzynski.edziennik.data.db.entity.Event { *; }
 -keep class pl.szczodrzynski.edziennik.data.db.full.EventFull { *; }
+-keep class pl.szczodrzynski.edziennik.data.db.entity.FeedbackMessage { *; }
 -keep class pl.szczodrzynski.edziennik.ui.modules.home.HomeCardModel { *; }
 -keepclassmembers class pl.szczodrzynski.edziennik.ui.widgets.WidgetConfig { public *; }
 -keepnames class pl.szczodrzynski.edziennik.ui.widgets.timetable.WidgetTimetableProvider