diff --git a/home/xin/calcite.nix b/home/xin/calcite.nix
index 20b90e6..b90e361 100644
--- a/home/xin/calcite.nix
+++ b/home/xin/calcite.nix
@@ -29,7 +29,7 @@
   };
 
   home.packages = with pkgs; [
-    betterbird
+    thunderbird
     remmina
   ];
 
diff --git a/machines/calcite/configuration.nix b/machines/calcite/configuration.nix
index 4601e8c..7fa91d2 100644
--- a/machines/calcite/configuration.nix
+++ b/machines/calcite/configuration.nix
@@ -225,6 +225,8 @@
 
     # ==== GUI Softwares ==== #
 
+    eudic
+
     # Gnome tweaks
     gnomeExtensions.paperwm
     gnomeExtensions.search-light
@@ -348,11 +350,11 @@
     fontconfig = {
       defaultFonts = {
         serif = [
-          "Noto Serif CJK SC"
+          "Source Han Serif SC"
           "Ubuntu"
         ];
         sansSerif = [
-          "Noto Sans CJK SC"
+          "Source Han Sans SC"
           "Ubuntu"
         ];
         monospace = [