diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox.nix
index 3e5b94e13028..e0552d6d3410 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox.nix
@@ -9,10 +9,10 @@
 
 buildMozillaMach rec {
   pname = "firefox";
-  version = "133.0.3";
+  version = "134.0";
   src = fetchurl {
     url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "ce48beaa5bb1717d9b6dbfff035b1bb5de1456df14b6a91adfaf3ccfb7ac550ab7ee854546231424a920e01d981825253609fce2ec326c4aa1ca316bbbdb31f8";
+    sha512 = "1275a686dc0a27b48df4ae05616511512f676e03474e3095b2521eac25a385d345aa3e8786716dbe812af49e07d72b32772479089d648968e2004ca0c9c35344";
   };
 
   meta = {