diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index b4e0d9c5826..0017d8d80f9 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -7,10 +7,10 @@ in
 rec {
   firefox = common rec {
     pname = "firefox";
-    ffversion = "84.0.1";
+    ffversion = "84.0.2";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
-      sha512 = "0sl93h7pjiznabv6865pdbal08nlqncnv3g40l02mgwbphjh5iqrr1bz14khaf58h4v1la090cj7z0gmd0c10xfrx6z7wngm152zz75";
+      sha512 = "2cxybnrcr0n75hnw18rrymw1jsd5crqfgnpk10hywbmnkdc72fx5sk51cg890pzwfiagicxfxsacnm3f6g8135k0wsz4294xjjwkm1z";
     };
 
     meta = {