diff --git a/appveyor.yml b/appveyor.yml
index d9dd9573..f1110ee1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,6 +12,10 @@ install:
 - cmd: set PATH=C:\Program Files (x86)\Inno Setup 6;%PATH%
 - cmd: if %platform%==Win32 set VCPKG_TRIPLET=x86-windows-static
 - cmd: if %platform%==x64   set VCPKG_TRIPLET=x64-windows-static
+- cmd: cd c:\tools\vcpkg\
+- cmd: git pull
+- cmd: .\bootstrap-vcpkg.bat
+- cmd: cd %APPVEYOR_BUILD_FOLDER%
 - cmd: vcpkg install libsndfile:%VCPKG_TRIPLET%
 
 before_build: