diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 7a01978f7d96..f7614dcf64a2 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -32,10 +32,10 @@ rec {
 
   firefox-esr = common rec {
     pname = "firefox-esr";
-    version = "52.5.3esr";
+    version = "52.6.0esr";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "7b9c87905c53bc681dc6475e05596449fed88850f9dc07c8223d0d3edd2dd9d8a0dd88ebae1cd59eced2165696df9370de5e85cc03cded58ec4d0f622634417f";
+      sha512 = "cf583df34272b7ff8841c3b093ca0819118f9c36d23c6f9b3135db298e84ca022934bcd189add6473922b199b47330c0ecf14c303ab4177c03dbf26e64476fa4";
     };
 
     patches =