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 75c3252c7a1b..95fdff409565 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 = "140.4.0esr";
+  version = "140.5.0esr";
   applicationName = "Firefox ESR";
   src = fetchurl {
     url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "cfce0bdcf6d4599c7b96bccd9fd1390bfb3645db9276a369a30760ce6819850aaa4251869e6bd3c5d8582ea3728b920762c5f16f7ce12ce151c3e74327b8c811";
+    sha512 = "412236a25cbea171bd5bd535e45c3ba40957a94e1f8dd3ab74241e0aa1c4075fcb8d394b9619599d60ce3e4563e712c825fa8bec441794f229356802f72b2861";
   };
 
   meta = {