diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@
 include(CheckIncludeFiles)
 
 
-find_package(Qt5 5.5 CONFIG REQUIRED
+find_package(Qt5 5.9 CONFIG REQUIRED
   Concurrent
   Core
   Gui