diff --git a/libraries/proguard-jackson-2.pro b/libraries/proguard-jackson-2.pro
index ee268bd..3d3b393 100644
--- a/libraries/proguard-jackson-2.pro
+++ b/libraries/proguard-jackson-2.pro
@@ -6,4 +6,9 @@
 }
 -keep class com.fasterxml.jackson.databind.ObjectWriter {
     public ** writeValueAsString(**);
-}
\ No newline at end of file
+}
+//for 2.8.5 to work on versions of android prior to L
+-keep class java.beans.Transient.** {*;}
+-keep class java.beans.ConstructorProperties.** {*;}
+-keep class java.nio.file.Path.** {*;}
+