diff --git a/appveyor.yml b/appveyor.yml
index 19e73f651..5c33e190a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,9 @@
 install:
   - C:\msys64\usr\bin\bash -lc "pacman --needed --noconfirm -Sy pacman-mirrors"
   - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -Sy"
-  - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S autoconf automake bison flex"
+  - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S zstd"
+  - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S autoconf automake"
+  - C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S  bison flex"
 
 build_script:
   - set PSDKDir=C:\Program Files\Microsoft SDKs\Windows\v7.1