diff --git a/.config/sway/config b/.config/sway/config
index 44d27bb..f64fd3b 100644
--- a/.config/sway/config
+++ b/.config/sway/config
@@ -248,6 +248,7 @@ assign [class="^Chromium$"] $workspace7
 assign [app_id="^chromium$"] $workspace7
 assign [class="^Thunderbird$"] $workspace4
 assign [app_id="^thunderbird$"] $workspace4
+assign [app_id="^thunderbird-beta$"] $workspace4
 assign [app_id="^thunar$"] $workspace5
 assign [class="^Slack$"] $workspace8
 assign [class="^Element$"] $workspace8