diff --git a/nixos/home-manager/env/config/hypr/hyprland.conf b/nixos/home-manager/env/config/hypr/hyprland.conf
index 62187b9a..ce895057 100644
--- a/nixos/home-manager/env/config/hypr/hyprland.conf
+++ b/nixos/home-manager/env/config/hypr/hyprland.conf
@@ -102,7 +102,7 @@ windowrule = workspace 1, ^(foot)$
 windowrule = workspace 2, ^(firefox)$
 windowrule = workspace 3, ^(org.kde.dolphin)$
 windowrule = workspace 4, ^(thunderbird)$
-windowrule = workspace 4, ^(mailspring)$
+windowrule = workspace 4, ^(Mailspring)$
 windowrule = workspace 5, ^(Element)$
 windowrule = workspace 5, ^(Signal)$
 windowrule = workspace 6, ^(Steam)$