diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 2044b1fd8c..f2603c0f70 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -101,5 +101,5 @@
 -dontnote biweekly.io.**
 
 #SASL
--keep class com.sun.mail.imap.protocol.IMAPSaslAuthenticator
--keep class com.sun.mail.smtp.SMTPSaslAuthenticator
+-keep class com.sun.mail.imap.protocol.IMAPSaslAuthenticator {*;}
+-keep class com.sun.mail.smtp.SMTPSaslAuthenticator {*;}