diff --git a/modules/home-manager/packages.nix b/modules/home-manager/packages.nix
index 7b6c950..5bff1c3 100644
--- a/modules/home-manager/packages.nix
+++ b/modules/home-manager/packages.nix
@@ -82,10 +82,11 @@
     ## Theming
     (nerdfonts.override {
       fonts = [
-        "FantasqueSansMono"
+        "IBMPlexMono"
         "NerdFontsSymbolsOnly"
       ];
     })
+    ibm-plex
     libsForQt5.qtstyleplugin-kvantum
     libsForQt5.qtwayland
     qt6Packages.qtstyleplugin-kvantum
diff --git a/modules/home-manager/programs/alacritty.nix b/modules/home-manager/programs/alacritty.nix
index 323d4b9..cb98060 100644
--- a/modules/home-manager/programs/alacritty.nix
+++ b/modules/home-manager/programs/alacritty.nix
@@ -16,11 +16,11 @@ in
 
       font = {
         normal = {
-          family = "FantasqueSansM Nerd Font";
+          family = "BlexMono Nerd Font";
           style = "Regular";
         };
 
-        size = 13;
+        size = 12;
       };
 
       window = {
diff --git a/modules/home-manager/programs/emacs/doom/config.el b/modules/home-manager/programs/emacs/doom/config.el
index 547bda1..d24d3c2 100644
--- a/modules/home-manager/programs/emacs/doom/config.el
+++ b/modules/home-manager/programs/emacs/doom/config.el
@@ -28,7 +28,7 @@
 ;; up, `M-x eval-region' to execute elisp code, and 'M-x doom/reload-font' to
 ;; refresh your font settings. If Emacs still can't find your font, it likely
 ;; wasn't installed correctly. Font issues are rarely Doom issues!
-(setq doom-font (font-spec :family "FantasqueSansM Nerd Font" :size 16))
+(setq doom-font (font-spec :family "BlexMono Nerd Font" :size 13))
 
 ;; There are two ways to load a theme. Both assume the theme is installed and
 ;; available. You can either set `doom-theme' or manually load a theme with the
diff --git a/modules/home-manager/programs/mako/config b/modules/home-manager/programs/mako/config
index 0567279..4e59b13 100644
--- a/modules/home-manager/programs/mako/config
+++ b/modules/home-manager/programs/mako/config
@@ -4,7 +4,7 @@ border-color=#282a36
 border-radius=20
 border-size=2
 default-timeout=10000
-format=<span font="FantasqueSansMono NF weight=325 Italic" size="12288">%s</span>\n<span font="FantasqueSansMono NF weight=325" size="12288">%b</span>
+format=<span font="IBM Plex Serif weight=325 Italic" size="12288">%s</span>\n<span font="IBM Plex Serif weight=325" size="12288">%b</span>
 group-by=summary
 height=125
 icon-location=right
@@ -17,7 +17,7 @@ text-color=#44475a
 width=300
 
 [grouped]
-format=<span font="FantasqueSansMono NF weight=325 Italic" size="12288">%s</span>\n<span font="FantasqueSansMono NF weight=325" size="12288">%b</span>
+format=<span font="IBM Plex Serif weight=325 Italic" size="12288">%s</span>\n<span font="IBM Plex Serif weight=325" size="12288">%b</span>
 
 [mode=do-not-disturb]
 invisible=1
diff --git a/modules/home-manager/programs/rofi/catppuccin-frappe.rasi b/modules/home-manager/programs/rofi/catppuccin-frappe.rasi
index 225200f..79cb8dc 100644
--- a/modules/home-manager/programs/rofi/catppuccin-frappe.rasi
+++ b/modules/home-manager/programs/rofi/catppuccin-frappe.rasi
@@ -9,7 +9,7 @@
     grey: #737994;
 
     width: 600;
-    font: "FantasqueSansM Nerd Font 14";
+    font: "IBM Plex Sans 14";
 }
 
 element-text, element-icon , mode-switcher {
@@ -87,7 +87,7 @@ button {
     padding: 10px;
     background-color: @bg-col-light;
     text-color: @grey;
-    vertical-align: 0.5; 
+    vertical-align: 0.5;
     horizontal-align: 0.5;
 }
 
diff --git a/modules/home-manager/programs/rofi/default.nix b/modules/home-manager/programs/rofi/default.nix
index 1ad328b..ea802ae 100644
--- a/modules/home-manager/programs/rofi/default.nix
+++ b/modules/home-manager/programs/rofi/default.nix
@@ -5,7 +5,7 @@
     enable = true;
     package = pkgs.rofi-wayland;
 
-    font = "FantasqueSansM Nerd Font";
+    font = "IBM Plex Sans";
 
     extraConfig = {
       disable-history = false;
diff --git a/modules/home-manager/programs/waybar.nix b/modules/home-manager/programs/waybar.nix
index 9ba44d5..aeeeab2 100644
--- a/modules/home-manager/programs/waybar.nix
+++ b/modules/home-manager/programs/waybar.nix
@@ -147,8 +147,8 @@
       * {
         all: unset;
         color: #c6d0f5;
-        font-family: "FantasqueSansM Nerd Font", 'Courier New', Courier, monospace;
-        font-size: 16px;
+        font-family: "IBM Plex Sans", 'Courier New', Courier, monospace;
+        font-size: 14px;
       }
 
       .modules-left,
diff --git a/modules/nixos/default.nix b/modules/nixos/default.nix
index 2c7933a..796ca94 100644
--- a/modules/nixos/default.nix
+++ b/modules/nixos/default.nix
@@ -9,5 +9,6 @@
     ./services.nix
     ./sound.nix
     ./system.nix
+    ./theming.nix
   ];
 }
diff --git a/modules/nixos/packages.nix b/modules/nixos/packages.nix
index 26e9f1f..0eee06e 100644
--- a/modules/nixos/packages.nix
+++ b/modules/nixos/packages.nix
@@ -72,8 +72,8 @@
     (catppuccin-sddm.override # So SDDM finds the theme files.
       {
         flavor = "frappe";
-        font = "FantasqueSansM Nerd Font";
-        fontSize = "12";
+        font = "IBM Plex Sans";
+        fontSize = "11";
         background = "${./theming/sddm/Background.jpg}";
         loginBackground = true;
       }
diff --git a/modules/nixos/theming.nix b/modules/nixos/theming.nix
new file mode 100644
index 0000000..96f2b24
--- /dev/null
+++ b/modules/nixos/theming.nix
@@ -0,0 +1,12 @@
+{ ... }:
+
+{
+  # Set the default fonts for the system.
+  fonts.fontconfig = {
+    defaultFonts = {
+      serif = [ "IBM Plex Serif" ];
+      sansSerif = [ "IBM Plex Sans" ];
+      monospace = [ "IBM Plex Mono" ];
+    };
+  };
+}