diff --git a/app/proguard-rules.txt b/app/proguard-rules.txt
index 7f19cf11..8fceb5b1 100644
--- a/app/proguard-rules.txt
+++ b/app/proguard-rules.txt
@@ -12,6 +12,12 @@
 -allowaccessmodification
 -dontpreverify
 
+# Kotlin
+-dontwarn kotlin.**
+
+# Apache Commons
+-dontwarn javax.script.**
+
 # ez-vcard
 -dontwarn ezvcard.io.json.**            # JSON serializer (for jCards) not used
 -dontwarn freemarker.**                 # freemarker templating library (for creating hCards) not used