diff --git a/.gitignore b/.gitignore
index 700ddb3d..c802b630 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,4 +71,5 @@ ref/
 *.aps
 
 builds/build_*
-builds/*.zip
\ No newline at end of file
+builds/*.zip
+builds/deps_*
diff --git a/appveyor.yml b/appveyor.yml
index f093d2aa..94464053 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,7 +3,7 @@ branches:
   except:
   - master
   - dp
-image: Visual Studio 2015
+image: Visual Studio 2017
 clone_depth: 1
 build_script:
 - cmd: >-
diff --git a/builds/cmake_win32.bat b/builds/cmake_win32.bat
index 7237e543..bec24d87 100644
--- a/builds/cmake_win32.bat
+++ b/builds/cmake_win32.bat
@@ -2,7 +2,7 @@ if not exist deps_win call %~dp0download_windeps.bat
 set DEPS_DIR="%cd%/deps_win"
 if not exist build_win32 mkdir build_win32
 pushd build_win32
-cmake ../.. -T v140_xp ^
+cmake ../.. -T v141_xp ^
 -DGLEW_INCLUDE_DIR=%DEPS_DIR%/glew-2.0.0/include ^
 -DGLEW_LIBRARY=%DEPS_DIR%/glew-2.0.0/lib/Release/Win32/glew32.lib ^
 -DGLFW3_ROOT_PATH=%DEPS_DIR%/glfw-3.2.1.bin.WIN32 ^
diff --git a/stdafx.h b/stdafx.h
index 83e96e3d..78bc2c27 100644
--- a/stdafx.h
+++ b/stdafx.h
@@ -5,6 +5,8 @@
 
 #pragma once
 
+#define _USE_MATH_DEFINES
+#include <cmath>
 #ifdef _MSC_VER
 // memory debug functions
 #define _CRTDBG_MAP_ALLOC
@@ -28,8 +30,6 @@
 // stl
 #include <cstdlib>
 #include <cassert>
-#define _USE_MATH_DEFINES
-#include <cmath>
 #include <cstdint>
 #include <iostream>
 #include <iomanip>