diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 008a0715b..efc7517cf 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -206,8 +206,6 @@
 -keep class javax.script.** { *; }
 -keep class com.sun.script.javascript.** { *; }
 -keep class org.mozilla.javascript.** { *; }
--dontwarn org.mozilla.javascript.**
--dontwarn sun.**
 
 ###EPUB
 -dontwarn nl.siegmann.epublib.**