diff --git a/appveyor.yml b/appveyor.yml
index 05a72d96df2a42ff566842725630fbf33c77422b..91316e66594ac65e3ad8bb4b04d5f5e2df3d2003 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,6 +29,8 @@ environment:
       MSYS2_ARCH: i686
 
 install:
+  - 'if "%compiler%"=="msys2" C:\msys64\usr\bin\bash -lc "pacman -Syu --noconfirm"'
+  - 'if "%compiler%"=="msys2" C:\msys64\usr\bin\bash -lc "pacman -Su --noconfirm"'
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-x86_64-ragel"
 
 build_script: