diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 53a9ecd5a..4a54d8992 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -51,3 +51,6 @@
     private void writeObject(java.io.ObjectOutputStream);
     private void readObject(java.io.ObjectInputStream);
 }
+
+# for some reason NotificationModeConfigFragment wasn't kept (only referenced in a preference xml)
+-keep class org.schabi.newpipe.settings.notifications.** { *; }