diff --git a/app/proguard/proguard.cfg b/app/proguard/proguard.cfg
index 51dede86f2..bef85c4817 100644
--- a/app/proguard/proguard.cfg
+++ b/app/proguard/proguard.cfg
@@ -4,6 +4,7 @@
 -keep class org.whispersystems.** { *; }
 -keep class org.signal.libsignal.net.** { *; }
 -keep class org.signal.libsignal.protocol.** { *; }
+-keep class org.signal.libsignal.usernames.** { *; }
 -keep class org.thoughtcrime.securesms.** { *; }
 -keep class org.signal.donations.json.** { *; }
 -keepclassmembers class ** {