diff --git a/app/build.gradle b/app/build.gradle
index bb27ff3..aa7ff0c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -39,6 +39,9 @@ android {
             signingConfig signingConfigs.release
         }
     }
+    packagingOptions {
+        exclude 'META-INF/core.kotlin_module'
+    }
     testOptions {
         unitTests {
             includeAndroidResources = true
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 45aef4f..69c46cc 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -19,8 +19,7 @@
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme"
-        android:name="android.support.multidex.MultiDexApplication"
-        tools:replace="android:allowBackup">
+        android:name="android.support.multidex.MultiDexApplication">
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name">
diff --git a/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.kt b/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.kt
index bc7f377..ff630b3 100644
--- a/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.kt
+++ b/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.kt
@@ -106,9 +106,9 @@ class MessageDetailFragment : Fragment() {
             text.linksClickable = true
             text.setTextIsSelectable(true)
 
-            val removed = item.labels.removeAll { it.type == Label.Type.UNREAD }
             val messageRepo = Singleton.getMessageRepository(ctx)
-            if (removed) {
+            if (item.isUnread()) {
+                Singleton.labeler.markAsRead(item)
                 (activity as? MainActivity)?.updateUnread()
                 messageRepo.save(item)
             }
diff --git a/build.gradle b/build.gradle
index a8cdb8e..140b4b2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.1.51'
+    ext.kotlin_version = '1.1.60'
     ext.anko_version = '0.10.2'
     repositories {
         jcenter()