diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 1b4a6236c94e..ab41e7b224e2 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -3,10 +3,10 @@
 {
   firefox = buildMozillaMach rec {
     pname = "firefox";
-    version = "114.0.2";
+    version = "115.0";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "1d514d09c6b964b96c6d52d54b89a89a92d53a6fe669e16a6370346c980db4d0ac6c502fa89219c71b680566b9eb982e9b3191c21f81d7326f34f6c837c0a872";
+      sha512 = "ed5d150e4dfdc01026beb3ae502a0b04321dd130084fdef63afce79a8a7a4898741d08f77716ba720c24f31b9c732c00ad0f1cd408b35b5eb6601a10014fb1a2";
     };
 
     meta = {