diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
index a8781e7658412..d8e740d0bca11 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
@@ -9,13 +9,13 @@
 
 buildMozillaMach rec {
   pname = "firefox-devedition";
-  version = "133.0b1";
+  version = "135.0b4";
   applicationName = "Mozilla Firefox Developer Edition";
   requireSigning = false;
   branding = "browser/branding/aurora";
   src = fetchurl {
     url = "mirror://mozilla/devedition/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "dced4aba71b07b68ee31c283945e7d62a7032f08f5cf71aa261fc7ba32f58277acbe9fdbdd28777d7f4b824e411815b069cab0ce791438088c9ad19c3d2de62e";
+    sha512 = "d3ee20d264c4c26308b814f4cc997349a6df32da17b9a29514b0504f7548606f4b6793ccd2e7464babf6588f13bfcc0e0641f9ac8d620f7da7d7e45684fdf775";
   };
 
   meta = {