diff --git a/config/Realtime.nix b/config/Realtime.nix
deleted file mode 100644
index 485e784..0000000
--- a/config/Realtime.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# Improve DE performance.
-{
-	lib,
-	config,
-	...
-}: let
-	cfg = config.module.realtime;
-in {
-	config = lib.mkIf cfg.enable {
-		security.pam.loginLimits = [{
-			domain = "@users";
-			item   = "rtprio";
-			type   = "-";
-			value  = 1;
-		}];
-	};
-}
diff --git a/config/Sway.nix b/config/Sway.nix
index 41e90b6..1dcfe18 100644
--- a/config/Sway.nix
+++ b/config/Sway.nix
@@ -13,7 +13,6 @@ in {
 			bluetooth.enable  = true;
 			brightness.enable = true;
 			portal.enable     = true;
-			realtime.enable   = true;
 			sound.enable      = true;
 			waybar.enable     = true;
 			wayland.enable    = true;
diff --git a/option/Realtime.nix b/option/Realtime.nix
deleted file mode 100644
index c78972b..0000000
--- a/option/Realtime.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-	lib,
-	...
-}: {
-	options.module.realtime.enable = lib.mkEnableOption "the realtime access.";
-}
diff --git a/option/Wallpaper.nix b/option/Wallpaper.nix
index c02d106..a5feff0 100644
--- a/option/Wallpaper.nix
+++ b/option/Wallpaper.nix
@@ -4,8 +4,8 @@
 	lib,
 	...
 }: let
-	url    = "https://images.unsplash.com/photo-1482517967863-00e15c9b44be?ixlib=rb-4.0.3&q=85&fm=jpg&crop=entropy&cs=srgb&dl=chad-madden-SUTfFCAHV_A-unsplash.jpg";
-	sha256 = "sha256-3T8Spa+gsemiyDcqBQCwZfWU1MWzu2AhPDF4wyeXxcQ=";
+	url    = "https://i.imgur.com/SNEPYVe.jpeg";
+	sha256 = "sha256-cOddztn8w3lJrfMINWQnplacV8eubsatTz73oTMo2bk=";
 	forceContrastText = false;
 in {
 	options.module.wallpaper = {
diff --git a/system/Pam.nix b/system/Pam.nix
new file mode 100644
index 0000000..457578f
--- /dev/null
+++ b/system/Pam.nix
@@ -0,0 +1,16 @@
+{ ... }: {
+	security.pam.loginLimits = [
+		{
+			domain = "*";
+			item   = "nofile";
+			type   = "soft";
+			value  = "99999";
+		}
+		{
+			domain = "@users";
+			item   = "rtprio";
+			type   = "-";
+			value  = 1;
+		}
+	];
+}