diff --git a/appveyor.yml b/appveyor.yml
index 54520db..7e93db2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -28,7 +28,7 @@ after_build:
 
     cd "%APPVEYOR_BUILD_FOLDER%\wufuc_setup_bat"
 
-	echo %BUILD_COMMIT_VERSION% >version.txt
+    echo %BUILD_COMMIT_VERSION% >version.txt
 
     for /R %%i in (*.txt) do unix2dos "%%i"