diff --git a/src/Speckle.Sdk/Host/HostAppVersion.cs b/src/Speckle.Sdk/Host/HostAppVersion.cs
index e9e26d33..2dc6c540 100644
--- a/src/Speckle.Sdk/Host/HostAppVersion.cs
+++ b/src/Speckle.Sdk/Host/HostAppVersion.cs
@@ -13,6 +13,8 @@ public enum HostAppVersion
   v2023,
   v2024,
   v2025,
+  v21,
+  v22,
   v25,
   v26,
   v715,