diff --git a/.appveyor.yml b/.appveyor.yml
index f6b16432..62d1f658 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -23,7 +23,7 @@ install:
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
 
   # Install miktex portable
-  - ps: "wget http://mirrors.ctan.org/systems/win32/miktex/setup/miktex-portable-2.9.5719.exe -OutFile ./miktex-portable.exe"
+  - ps: "If (!(Test-Path miktex-portable.exe)){wget http://mirrors.ctan.org/systems/win32/miktex/setup/miktex-portable-2.9.5719.exe -OutFile ./miktex-portable.exe}"
   - "7z x miktex-portable.exe * -aot -omiktex > nul"
 
   #- cmd: dir .\miktex\miktex\bin