diff --git a/proguard-rules.pro b/proguard-rules.pro
index 95917dd1f..54342f257 100644
--- a/proguard-rules.pro
+++ b/proguard-rules.pro
@@ -1 +1,2 @@
 -keep class com.b44t.messenger.** { *; }
+#-keep class com.coremedia.iso.** { *; }