diff -r 6dcaece8ec41 -r dd635af15958 proguard-project.txt
--- a/proguard-project.txt	Fri Feb 13 23:45:37 2015 +0100
+++ b/proguard-project.txt	Sat Feb 14 00:21:19 2015 +0100
@@ -22,6 +22,7 @@
 
 -dontwarn org.apache.**
 -dontwarn sun.**
+-dontwarn net.fortuna.ical4j.**
 
 
 # If your project uses WebView with JS, uncomment the following