diff --git a/pkgs/by-name/fo/font-manager/package.nix b/pkgs/by-name/fo/font-manager/package.nix
index 83fba770c113..aff880f06d2d 100644
--- a/pkgs/by-name/fo/font-manager/package.nix
+++ b/pkgs/by-name/fo/font-manager/package.nix
@@ -13,11 +13,11 @@
 , yelp-tools
 , vala
 , gsettings-desktop-schemas
-, gtk3
+, gtk4
 , adwaita-icon-theme
 , desktop-file-utils
 , nix-update-script
-, wrapGAppsHook3
+, wrapGAppsHook4
 , gobject-introspection
 # withWebkit enables the "webkit" feature, also known as Google Fonts
 , withWebkit ? true, glib-networking, libsoup, webkitgtk
@@ -25,13 +25,13 @@
 
 stdenv.mkDerivation rec {
   pname = "font-manager";
-  version = "0.8.9";
+  version = "0.9.0";
 
   src = fetchFromGitHub {
     owner = "FontManager";
     repo = "font-manager";
     rev = version;
-    hash = "sha256-LsQry6CjvVcJFRutKOaqA4lLP7Ek09Q/D/TPnSvx59Q=";
+    hash = "sha256-nUFxjqUiL8zLfPJrLM1aQ/SZ2x6CYFKFJI1W/eXlrV8=";
   };
 
   nativeBuildInputs = [
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     desktop-file-utils
     vala
     yelp-tools
-    wrapGAppsHook3
+    wrapGAppsHook4
     # For https://github.com/FontManager/master/blob/master/lib/unicode/meson.build
     gobject-introspection
   ];
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     json-glib
     sqlite
     gsettings-desktop-schemas # for font settings
-    gtk3
+    gtk4
     adwaita-icon-theme
   ] ++ lib.optionals withWebkit [
     glib-networking # for SSL so that Google Fonts can load
@@ -67,11 +67,6 @@ stdenv.mkDerivation rec {
     (lib.mesonBool "webkit" withWebkit)
   ];
 
-  postPatch = ''
-    chmod +x meson_post_install.py
-    patchShebangs meson_post_install.py
-  '';
-
   passthru.updateScript = nix-update-script { };
 
   meta = with lib; {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f10828f7446d..14f3561773b7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -30355,7 +30355,7 @@ with pkgs;
 
   font-manager = callPackage ../by-name/fo/font-manager/package.nix {
     libsoup = libsoup_3;
-    webkitgtk = webkitgtk_4_1;
+    webkitgtk = webkitgtk_6_0;
   };
 
   fontfinder = callPackage ../applications/misc/fontfinder { };