diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 5923a42fbd9b..c468c693bd3d 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -94,11 +94,11 @@
 
   firefox-esr-115 = buildMozillaMach rec {
     pname = "firefox-esr-115";
-    version = "115.9.1esr";
+    version = "115.10.0esr";
     applicationName = "Mozilla Firefox ESR";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "9ccaede2fcda13a07f98a2110bb8f99c7324601d66bff311f3070a669576a1598fe1d7de2d005d725d1f44dbe3934a9c0fd0b7950f60686047d4ce8d9d812310";
+      sha512 = "0626e2c68ce43f24dfc2b9216e2565537ad8781daf4195d53420e1b78d57d0f6360fbe56b0ddbedae3818546c72472c85c1ff2b208c123d32a0543e666f42b65";
     };
 
     meta = {