diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox.nix
index 682ef706f414..1a91ea09423c 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox.nix
@@ -9,10 +9,10 @@
 
 buildMozillaMach rec {
   pname = "firefox";
-  version = "151.0.2";
+  version = "151.0.3";
   src = fetchurl {
     url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "87308953ed354a2799a9a45be40033bf9ff8d80fa220f034aacfbd6e754716901d4164c37fa56032c659b259116603e0ba2b566c1f3651ab9cc0835d502cd739";
+    sha512 = "511723e5cf042abb66cbeda89b78d42de8d1b53544565670173f3e69c2a7ceefc76468c90576221418bfc9b122151ec117978caa4823cfb9b80797f3064bd895";
   };
 
   meta = {