diff --git a/flake.lock b/flake.lock
index f722e6e1..416272f0 100644
Binary files a/flake.lock and b/flake.lock differ
diff --git a/flake.nix b/flake.nix
index 492580fc..11b4e92a 100644
Binary files a/flake.nix and b/flake.nix differ
diff --git a/homeManagerModules/firefox/gx-theme.nix b/homeManagerModules/firefox/gx-theme.nix
index 318d2b01..db522f1b 100644
--- a/homeManagerModules/firefox/gx-theme.nix
+++ b/homeManagerModules/firefox/gx-theme.nix
@@ -1,27 +1,38 @@
 {
   lib,
   mkVersion,
-  firefox-gx-src,
+  self,
   stdenvNoCC,
-}:
-stdenvNoCC.mkDerivation {
-  pname = "firefox-gx";
-  version = mkVersion firefox-gx-src;
+}: let
+  inherit (builtins) fromJSON readFile;
+  inherit (lib) hasPrefix replaceStrings;
 
-  src = firefox-gx-src;
+  inherit (self.inputs) firefox-gx-src;
 
-  installPhase = ''
-    # Personal changes
-    sed -i 's/var(--fuchsia))/var(--purple))/' ./chrome/components/ogx_root-personal.css
-    sed -i 's#../newtab/wallpaper-dark1.png#../newtab/wallpaper-dark2.png#' ./chrome/components/ogx_root-personal.css
+  lock = fromJSON (readFile ../flake.lock);
+  rev = lock.nodes.firefox-gx-src.original.ref;
+in
+  stdenvNoCC.mkDerivation {
+    pname = "firefox-gx";
+    version =
+      if hasPrefix "v." rev
+      then replaceStrings ["v"] ["0"] rev
+      else mkVersion firefox-gx-src;
 
-    mkdir -p $out
-    cp -r ./* $out
-  '';
+    src = firefox-gx-src;
 
-  meta = {
-    description = "Firefox Theme CSS to Opera GX Lovers";
-    homepage = "https://github.com/Godiesc/firefox-gx";
-    license = lib.licenses.mspl;
-  };
-}
+    installPhase = ''
+      # Personal changes
+      sed -i 's/var(--fuchsia))/var(--purple))/' ./chrome/components/ogx_root-personal.css
+      sed -i 's#../newtab/wallpaper-dark1.png#../newtab/wallpaper-dark2.png#' ./chrome/components/ogx_root-personal.css
+
+      mkdir -p $out
+      cp -r ./* $out
+    '';
+
+    meta = {
+      description = "Firefox Theme CSS to Opera GX Lovers";
+      homepage = "https://github.com/Godiesc/firefox-gx";
+      license = lib.licenses.mspl;
+    };
+  }
diff --git a/inputs/default.nix b/inputs/default.nix
index 10071f8f..9c0cc856 100644
--- a/inputs/default.nix
+++ b/inputs/default.nix
@@ -344,7 +344,7 @@ let
     {
       owner = "Godiesc";
       repo = "firefox-gx";
-      # ref = "v.9.6";
+      ref = "v.9.7";
     }
     {
       name = "git-theme-src";