diff --git a/build.gradle b/build.gradle
index f93a691e7..b96a299ef 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.3'
+        classpath 'com.android.tools.build:gradle:3.1.4'
     }
 }
 
@@ -19,9 +19,6 @@ repositories {
     maven {
         url "https://jitpack.io"
     }
-    maven {
-        url "https://oss.sonatype.org/content/repositories/snapshots"
-    }
 }
 
 configurations {
@@ -66,7 +63,7 @@ dependencies {
     implementation 'com.wefika:flowlayout:0.4.1'
     implementation 'com.googlecode.ez-vcard:ez-vcard:0.10.3'
     implementation 'in.championswimmer:SimpleFingerGestures_Android_Library:1.2'
-    implementation 'rocks.xmpp:xmpp-addr:0.8.0-SNAPSHOT'
+    implementation 'rocks.xmpp:xmpp-addr:0.8.0'
 }
 
 ext {
diff --git a/src/main/java/de/pixart/messenger/xmpp/InvalidJid.java b/src/main/java/de/pixart/messenger/xmpp/InvalidJid.java
index ce381abdc..fdaadeab2 100644
--- a/src/main/java/de/pixart/messenger/xmpp/InvalidJid.java
+++ b/src/main/java/de/pixart/messenger/xmpp/InvalidJid.java
@@ -68,6 +68,11 @@ public class InvalidJid implements Jid {
         throw new AssertionError("Not implemented");
     }
 
+    @Override
+    public boolean isDomainJid() {
+        throw new AssertionError("Not implemented");
+    }
+
     @Override
     public Jid asBareJid() {
         throw new AssertionError("Not implemented");