diff --git a/modules/desktop/default.nix b/modules/desktop/default.nix
index c0af4b8..a2e4d0b 100644
--- a/modules/desktop/default.nix
+++ b/modules/desktop/default.nix
@@ -39,7 +39,9 @@ in {
 
       # various evironment variables that are needed for everything desktop related
       environment.sessionVariables = {
-        MOZ_DISABLE_RDD_SANDBOX = "1";
+        # automatic hidpi for qt apps
+        QT_AUTO_SCREEN_SCALE_FACTOR = "1";
+        QT_ENABLE_HIGHDPI_SCALING = "1";
       };
     }
     (mkIf (cfg.envProto == "wayland") {
diff --git a/modules/desktop/sddm.nix b/modules/desktop/sddm.nix
index 9067a87..648b6c5 100644
--- a/modules/desktop/sddm.nix
+++ b/modules/desktop/sddm.nix
@@ -16,9 +16,12 @@ in {
       libsForQt5.qt5.qtgraphicaleffects
       libsForQt5.qt5.qtquickcontrols2
     ];
+    # why do we need kwin for working hidpi
+    # huh????
     services.displayManager.sddm = {
       enable = true;
       wayland.enable = config.modules.desktop.envProto == "wayland"; 
+      wayland.compositor = "kwin";
       theme = config.modules.desktop.themes.sddmTheme.name;
       settings = {
         Theme = {
diff --git a/modules/desktop/themes/catppuccin/default.nix b/modules/desktop/themes/catppuccin/default.nix
index a3008bb..984becd 100644
--- a/modules/desktop/themes/catppuccin/default.nix
+++ b/modules/desktop/themes/catppuccin/default.nix
@@ -47,6 +47,7 @@ in {
         package = (pkgs.my.catppuccin-sddm-corners.override {
           config.General = {
             Background = ../../../../assets/lockscreen.png;
+            GeneralFontSize = toString config.modules.desktop.fonts.fonts.sansSerif.size;
             Font = config.modules.desktop.fonts.fonts.sansSerif.family;
           };
         });