diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index dd1a5ec56a41..825ab23178fd 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -123,11 +123,11 @@
 
   firefox-esr-115 = buildMozillaMach rec {
     pname = "firefox-esr-115";
-    version = "115.16.0esr";
+    version = "115.16.1esr";
     applicationName = "Mozilla Firefox ESR";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "b6f93ec3d6acac5df177253c65b833c017e65ed6e78e96ff029098443928d291f6f67164aedb83d80aa28ee9dee305086597798238d3330e35183030e53e3550";
+      sha512 = "eca42b3494fdab73e67d5c8e8b76520729adb75b5cad85172953dba56b225b0f05dcfea70fe8cc3e1bf1cd3d7103159cc20095d5480bb1b0e6d3ec90588988a8";
     };
 
     meta = {