diff --git a/default.nix b/default.nix
index 82b9463..2f7c6b9 100644
--- a/default.nix
+++ b/default.nix
@@ -1,7 +1,7 @@
 { pkgs ? import <nixpkgs> { } }:
 
 let
-  firefox = pkgs.firefox-esr-unwrapped.override {
+  firefox = pkgs.firefox-esr-52-unwrapped.override {
     gtk3Support            = true;
     enableOfficialBranding = true;
     privacySupport         = true;