diff --git a/src/constants.js b/src/constants.js
index 47bd3b7..ea205f3 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -58,6 +58,10 @@ exports.WINFSP_VERSION_NAMES = [
   'WinFsp 2020.0',
   'WinFsp 2020.1',
   'WinFsp 2020.2',
+  'WinFsp 2021 B1',
+  'WinFsp 2021 B2',
+  'WinFsp 2021 Beta1',
+  'WinFsp 2021 Beta2',
 ];
 
 exports.DATA_LOCATIONS = {