diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-140.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-140.nix
index b4261e3197a3..deeecde37523 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-140.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-140.nix
@@ -9,11 +9,11 @@
 
 buildMozillaMach rec {
   pname = "firefox";
-  version = "140.10.1esr";
+  version = "140.10.2esr";
   applicationName = "Firefox ESR";
   src = fetchurl {
     url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "aa3481dbdda0a302acefff52007ba2e6927962523408b942a7df673e80618fc381faf1ca70ebaac3760645bf7cb382b85658af49beca705cd636ce9de58349a5";
+    sha512 = "bda7d5e6d59a2ad310e3f3e6e8ec05c78222edce266671d5d454dfa3e8f0086add3b9c0099db907cb62b2587ed47026ba7b3aa4f0406693d142d8d91b818d551";
   };
 
   meta = {