diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index fad0e953634..16a17dde042 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 = "89.0";
+    ffversion = "89.0.1";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
-      sha512 = "5089720feda15d054d0aa4c3bdeb84760314dadd6381d7360e688d8e396154868220c6315add650d8d2a42652cb8a9bfeb833885812ef0bd70a74ee58ad18aa3";
+      sha512 = "67da387b3b6c5a110c83208f9a15d6064adf423bbebfb0fcad2d85f6c4b615b27da0cbd5486b817f0d5e040bc3e70d74d9af72599b24384397fef1dd153bd3f3";
     };
 
     meta = {