diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 9e50bdae173..ef1cc5a08f6 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -3,10 +3,10 @@
 rec {
   firefox = buildMozillaMach rec {
     pname = "firefox";
-    version = "101.0";
+    version = "101.0.1";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "fffe7e0940c1443fcdc5b205677764cb4e04b29f33fcfafb2857d383700584f309806b81fc4989efb56cc12a3cca1ff7d451b647050c43e98777b5c952ed5d56";
+      sha512 = "435a7f6013582933e75c41e554a45beda30b5affd7d3ed7d2876026609ba7f17b2c20b507d9d0c9ce2379e335ec09b021257ba30ac55fabf02dca54b03ea70b4";
     };
 
     meta = {