diff --git a/pkgs/applications/networking/browsers/firefox/default.nix b/pkgs/applications/networking/browsers/firefox/default.nix
index 42c168379466..d6887ae7411f 100644
--- a/pkgs/applications/networking/browsers/firefox/default.nix
+++ b/pkgs/applications/networking/browsers/firefox/default.nix
@@ -138,8 +138,8 @@ in {
 
   firefox-esr-unwrapped = common {
     pname = "firefox-esr";
-    version = "45.2.0esr";
-    sha512 = "fd67353cff9400080a311af92562b1ed26d20ca2229e32e8c8289b364ebe27fd501eed78c72b614e0501c3841ae9b17f2102158fbeef5083bee8c12d952660e6";
+    version = "45.3.0esr";
+    sha512 = "ee618aec579625122c3e511a7ac83ac4db9718f5695b6fe6250717602178bae9bb7e5ebe8764f4d33ecf44d3db13abfed0d24c1ec71e64a1087fb6d5a579b0c0";
   };
 
 }