diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 359b959b94aa..19dfba0b0ebd 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -25,10 +25,10 @@ rec {
 
   firefox-esr = common rec {
     pname = "firefox-esr";
-    version = "52.2.1esr";
+    version = "52.3.0esr";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "1d79e6e4625cf7994f6d6bbdf227e483fc407bcdb20e0296ea604969e701f551b5df32f578d4669cf654b65927328c8eb0f717c7a12399bf1b02a6ac7a0cd1d3";
+      sha512 = "36da8f14b50334e36fca06e09f15583101cadd10e510268255587ea9b09b1fea918da034d6f1d439ab8c34612f6cebc409a0b8d812dddb3f997afebe64d09fe9";
     };
 
     meta = firefox.meta // {