diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index e2f32742e..98377ad4a 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -12,6 +12,7 @@
 -keep,allowobfuscation,allowshrinking class * extends com.google.gson.reflect.TypeToken
 
 # SimpleXML
+-keep class org.simpleframework.xml.** { *; }
 -keep interface org.simpleframework.xml.core.Label { public *; }
 -keep class * implements org.simpleframework.xml.core.Label { public *; }
 -keep interface org.simpleframework.xml.core.Parameter { public *; }