diff --git a/nixos/modules/services/x11/display-managers/gdm.nix b/nixos/modules/services/x11/display-managers/gdm.nix
index 3ee04d328c87..515ca0cd90b2 100644
--- a/nixos/modules/services/x11/display-managers/gdm.nix
+++ b/nixos/modules/services/x11/display-managers/gdm.nix
@@ -211,7 +211,10 @@ in
       pkgs.gnome-session
       pkgs.gnome-shell
     ];
-    environment.systemPackages = [ pkgs.adwaita-icon-theme ];
+    environment.systemPackages = [
+      pkgs.adwaita-icon-theme
+      pkgs.gdm # For polkit rules
+    ];
 
     # We dont use the upstream gdm service
     # it has to be disabled since the gdm package has it
diff --git a/pkgs/by-name/gd/gdm/package.nix b/pkgs/by-name/gd/gdm/package.nix
index 61dddd4aa1d5..99967c83fd4d 100644
--- a/pkgs/by-name/gd/gdm/package.nix
+++ b/pkgs/by-name/gd/gdm/package.nix
@@ -43,7 +43,7 @@ in
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "gdm";
-  version = "48.beta";
+  version = "48.0";
 
   outputs = [
     "out"
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   src = fetchurl {
     url = "mirror://gnome/sources/gdm/${lib.versions.major finalAttrs.version}/gdm-${finalAttrs.version}.tar.xz";
-    hash = "sha256-rNZygkDTQkz4uTR5qBr8si8Fw2EKI9gwlK/joCb5zm0=";
+    hash = "sha256-G8Btr/CT7HteN+y0+S5do0dKGxugdu25FR7pZ9HDCt8=";
   };
 
   mesonFlags = [