diff --git a/appveyor.yml b/appveyor.yml
index cc4acec1c..356afce66 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,7 +29,7 @@ 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 --force -Syu --noconfirm"'
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S mingw-w64-x86_64-ragel"
 
 build_script: