diff --git a/build.gradle b/build.gradle
index 1044150fa..8c3596ade 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.3'
+        classpath 'com.android.tools.build:gradle:3.1.4'
     }
 }
 
@@ -16,9 +16,6 @@ repositories {
     google()
     jcenter()
     mavenCentral()
-    maven {
-        url "https://oss.sonatype.org/content/repositories/snapshots"
-    }
 }
 
 configurations {
@@ -52,7 +49,7 @@ dependencies {
     implementation 'com.makeramen:roundedimageview:2.3.0'
     implementation "com.wefika:flowlayout:0.4.1"
     implementation 'net.ypresto.androidtranscoder:android-transcoder:0.2.0'
-    implementation 'rocks.xmpp:xmpp-addr:0.8.0-SNAPSHOT'
+    implementation 'rocks.xmpp:xmpp-addr:0.8.0'
     implementation 'org.osmdroid:osmdroid-android:6.0.1'
 }
 
diff --git a/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java b/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java
index c98da2a16..646d9544d 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java
+++ b/src/main/java/eu/siacs/conversations/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");