diff --git a/clean_build.bat b/clean_build.bat
index c5e2153e..b1f0410c 100644
--- a/clean_build.bat
+++ b/clean_build.bat
@@ -3,8 +3,8 @@
 REM defaults - override them by creating a build_env.bat file
 set B_BUILD_TYPE=Debug
 set B_QT_ROOT=C:\Qt
-set B_QT_VER=5.6.3
-set B_QT_MSVC=msvc2015_64
+set B_QT_VER=5.11.1
+set B_QT_MSVC=msvc2017_64
 set B_BONJOUR=C:\Program Files\Bonjour SDK
 
 set savedir=%cd%