diff --git a/build/appveyor/MSVC-appveyor-install.bat b/build/appveyor/MSVC-appveyor-install.bat
index 09b7cc49445..444e70e735a 100644
--- a/build/appveyor/MSVC-appveyor-install.bat
+++ b/build/appveyor/MSVC-appveyor-install.bat
@@ -38,7 +38,7 @@ IF "%APPVEYOR_BUILD_ID%" == "" (
 )
 
 cinst -y jdk8                             || EXIT /B
-cinst -y winflexbison3                    || EXIT /B
+cinst -y winflexbison3 --version 2.5.18.20190508                   || EXIT /B
 
 :: zlib - not available through chocolatey
 CD "%APPVEYOR_SCRIPTS%"                   || EXIT /B