diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 0a95949107e..dc89b57fd94 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -58,10 +58,10 @@ rec {
 
   firefox-esr-78 = common rec {
     pname = "firefox-esr";
-    ffversion = "78.13.0esr";
+    ffversion = "78.14.0esr";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${ffversion}/source/firefox-${ffversion}.source.tar.xz";
-      sha512 = "78a5dc8713ab879ebfc3b8fd7a8219844d06f0d897342fdf9a11471633d98e148ff85cf10e561899df4910b94a33b57709b64788df4621a8c0b83eb9a7102cef";
+      sha512 = "5d5e4b1197f87b458a8ab14a62701fa0f3071e9facbb4fba71a64ef69abf31edbb4c5efa6c20198de573216543b5289270b5929c6e917f01bb165ce8c139c1ac";
     };
 
     meta = {