diff --git a/appveyor.yml b/appveyor.yml
index 0d84400..9e3d542 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,7 +14,11 @@ install:
 - ps: iwr "https://download.microsoft.com/download/c/f/8/cf80b955-d578-4635-825c-2801911f9d79/wdk/wdksetup.exe" -OutFile wdksetup.exe
 - cmd: .\wdksetup.exe /features + /q /norestart
 - cmd: git submodule -q update --init
-- cmd: git clone -q https://github.com/microsoft/DMF.git C:\projects\DMF
+- cmd: git clone -q https://github.com/microsoft/DMF.git C:\projects\DMF 2> nul || set ERRORLEVEL=0
+- cmd: |
+    cd "C:\projects\DMF"
+    git pull > NUL
+    cd %appveyor_build_folder%
 before_build:
 - ps: Invoke-WebRequest "https://github.com/nefarius/vpatch/releases/latest/download/vpatch.exe" -OutFile vpatch.exe
 - cmd: vpatch.exe --stamp-version "%APPVEYOR_BUILD_VERSION%" --target-file ".\sys\ViGEmBus.vcxproj" --vcxproj.inf-time-stamp