diff --git a/src/mingw32make.bat b/src/mingw32make.bat
index 65ce35e..008a154 100644
--- a/src/mingw32make.bat
+++ b/src/mingw32make.bat
@@ -1,4 +1,4 @@
-set QTDIR=C:\Qt\4.8.5
+set QTDIR=C:\Qt\4.8.6
 set MINGW=C:\MinGW
 
 set PATH=%QTDIR%\bin;%MINGW%\bin;%PATH%