diff --git a/appveyor/build.bat b/appveyor/build.bat
index c8005734e16eb..3593228389e0f 100644
--- a/appveyor/build.bat
+++ b/appveyor/build.bat
@@ -20,7 +20,7 @@ if not exist "%SDK_RUNNER%" (
 
 if not exist "%PHP_BUILD_CACHE_SDK_DIR%" (
 	echo Cloning remote SDK repository
-	git clone --branch %SDK_BRANCH% %SDK_REMOTE% "%PHP_BUILD_CACHE_SDK_DIR%" 2>&1
+	git clone --branch %SDK_BRANCH% %SDK_REMOTE% --depth 1 "%PHP_BUILD_CACHE_SDK_DIR%" 2>&1
 )
 
 for /f "tokens=*" %%a in ('type %PHP_BUILD_CACHE_SDK_DIR%\VERSION') do set GOT_SDK_VER=%%a