diff --git a/.appveyor.yml b/.appveyor.yml
index 8b30733f..b99c7f3e 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -34,7 +34,8 @@ init:
 install:
     - ps: if (Test-Path Env:\CYG_ROOT) { Start-FileDownload "http://cygwin.com/$env:CYG_SETUP" -FileName "$env:CYG_SETUP" }
     - if defined CYG_ROOT (%CYG_SETUP% --quiet-mode --no-shortcuts --only-site --root "%CYG_ROOT%" --site "%CYG_MIRROR%" --local-package-dir "%CYG_CACHE%" --packages make,gcc-core,clang,pkg-config,libpcre-devel,libglib2.0-devel,cmake,python-setuptools,ruby,mingw64-i686-gcc-core,mingw64-x86_64-gcc-core --upgrade-also)
-    - if defined MSYSTEM (%BASH% -lc "pacman -Suy --noconfirm mingw-w64-x86_64-glib2 mingw-w64-i686-glib2 cmake")
+    - if defined MSYSTEM (%BASH% -lc "pacman -Suuy --noconfirm mingw-w64-x86_64-glib2 mingw-w64-i686-glib2 cmake")
+    - if defined MSYSTEM (%BASH% -lc "pacman -Suuy --noconfirm")
 build_script:
     - if defined BASH (%BASH% -lc "cd $(cygpath ${APPVEYOR_BUILD_FOLDER}); ./install-cmocka-linux.sh; make;")
     - if "%MSYSTEM%" == "MINGW64" (%BASH% -lc "cd $(cygpath ${APPVEYOR_BUILD_FOLDER}); make -C bindings/go")