diff --git a/3rdparty/singleapplication/singleapplication.h b/3rdparty/singleapplication/singleapplication.h
index 2700a0cda..5f754e088 100644
--- a/3rdparty/singleapplication/singleapplication.h
+++ b/3rdparty/singleapplication/singleapplication.h
@@ -114,7 +114,7 @@ public:
      * @note sendMessage() will return false if invoked from the primary
      * instance.
      */
-    bool sendMessage( QByteArray message, int timeout = 100 );
+    bool sendMessage( QByteArray message, int timeout = 1000 );
 
 Q_SIGNALS:
     void instanceStarted();
diff --git a/3rdparty/singleapplication/singlecoreapplication.h b/3rdparty/singleapplication/singlecoreapplication.h
index 7d6aa7b8b..8909c05e4 100644
--- a/3rdparty/singleapplication/singlecoreapplication.h
+++ b/3rdparty/singleapplication/singlecoreapplication.h
@@ -114,7 +114,7 @@ public:
      * @note sendMessage() will return false if invoked from the primary
      * instance.
      */
-    bool sendMessage( QByteArray message, int timeout = 100 );
+    bool sendMessage( QByteArray message, int timeout = 1000 );
 
 Q_SIGNALS:
     void instanceStarted();