diff --git a/lib/ui/screens/conversation_screen.dart b/lib/ui/screens/conversation_screen.dart
index 7843eae..70caac4 100644
--- a/lib/ui/screens/conversation_screen.dart
+++ b/lib/ui/screens/conversation_screen.dart
@@ -64,8 +64,7 @@ class _ConversationScreenState extends State<ConversationScreen> {
   void deactivate() {
     super.deactivate();
 
-    if(_refreshTime != null)
-      _refreshTime.cancel();
+    if (_refreshTime != null) _refreshTime.cancel();
   }
 
   void _setError(ErrorLevel err) => setState(() => _error = err);
@@ -94,6 +93,8 @@ class _ConversationScreenState extends State<ConversationScreen> {
 
   /// Load a list of messages
   Future<void> _loadMessages(bool online) async {
+    if (!mounted) return;
+
     //First, get the messages
     final messages = await _conversationsHelper.getNewMessages(
         conversationID: widget.conversationID,
@@ -417,27 +418,27 @@ class _ConversationScreenState extends State<ConversationScreen> {
     final choice = await showDialog<bool>(
       context: context,
       builder: (c) => AlertDialog(
-            title: Text(tr("Confirm deletion")),
-            content: Text(
-              tr("Do you really want to delete this message ? The operation can not be cancelled !"),
-              textAlign: TextAlign.justify,
+        title: Text(tr("Confirm deletion")),
+        content: Text(
+          tr("Do you really want to delete this message ? The operation can not be cancelled !"),
+          textAlign: TextAlign.justify,
+        ),
+        actions: <Widget>[
+          FlatButton(
+            child: Text(
+              tr("Cancel").toUpperCase(),
             ),
-            actions: <Widget>[
-              FlatButton(
-                child: Text(
-                  tr("Cancel").toUpperCase(),
-                ),
-                onPressed: () => Navigator.pop(c, false),
-              ),
-              FlatButton(
-                child: Text(
-                  tr("Confirm").toUpperCase(),
-                  style: TextStyle(color: Colors.red),
-                ),
-                onPressed: () => Navigator.pop(c, true),
-              ),
-            ],
+            onPressed: () => Navigator.pop(c, false),
           ),
+          FlatButton(
+            child: Text(
+              tr("Confirm").toUpperCase(),
+              style: TextStyle(color: Colors.red),
+            ),
+            onPressed: () => Navigator.pop(c, true),
+          ),
+        ],
+      ),
     );
 
     if (choice == null || !choice) return;