diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 61c0d06d0..6d1f5d9be 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -54,3 +54,6 @@
 -keepclasseswithmembers class org.schabi.newpipe.** {
     kotlinx.serialization.KSerializer serializer(...);
 }
+
+# See https://github.com/TeamNewPipe/NewPipe/issues/13508
+-keep class org.ocpsoft.prettytime.i18n.Resources* { *; }