diff --git a/appveyor.yml b/appveyor.yml
index f8dc7d5..da28311 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,7 +3,7 @@ branches:
   only:
   - blueprint
 skip_tags: true
-image: Visual Studio 2017
+image: Visual Studio 2019
 
 environment:
   REPO_SLUG: vicr123/the-libs
diff --git a/appveyor/build.bat b/appveyor/build.bat
index ba5b0ee..6d07762 100644
--- a/appveyor/build.bat
+++ b/appveyor/build.bat
@@ -1,10 +1,13 @@
-if "%APPVEYOR_REPO_TAG_NAME%"=="continuous" (

-    exit 1

-)

-
-set QTDIR=C:\Qt\5.11\msvc2017_64
-set PATH=%PATH%;%QTDIR%\bin
-call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
-qmake the-libs.pro
-nmake release
-nmake install
+if "%APPVEYOR_REPO_TAG_NAME%"=="continuous" (
+
+    exit 1
+
+)
+
+
+set QTDIR=C:\Qt\5.15\msvc2019_64
+set PATH=%PATH%;%QTDIR%\bin
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
+qmake the-libs.pro
+nmake release
+nmake install
diff --git a/lib/lib.pro b/lib/lib.pro
index 3ee39c9..085d911 100644
--- a/lib/lib.pro
+++ b/lib/lib.pro
@@ -10,7 +10,7 @@ TARGET = the-libs
 TEMPLATE = lib
 
 unix:!android {
-    CONFIG   += c++14
+    CONFIG += c++14
     system("pkg-config --version") {
         CONFIG += link_pkgconfig
         packagesExist(libunwind) {
@@ -41,12 +41,12 @@ unix:!android {
 }
 
 macx {
-    CONFIG   += c++14
+    CONFIG += c++14
     LIBS += -framework CoreFoundation -framework Cocoa
 }
 
 win32 {
-    CONFIG   += c++17
+    CONFIG += c++17
     LIBS += -lUser32 -lKernel32 -lDbgHelp -lwindowsapp
     DEFINES += _WIN32_WINNT=0x0601 # Windows 7 or up
 }