diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index f8a392bd5306..942d1b080223 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -30,11 +30,11 @@
 
   firefox-beta = buildMozillaMach rec {
     pname = "firefox-beta";
-    version = "117.0b5";
+    version = "117.0b9";
     applicationName = "Mozilla Firefox Beta";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "8cb7a96a996b5d3b4e119b4b6317eb7015f9e3d96a3c6a301effe4e5cdaf1c8295a68e57cd919b42a1bef8717ae6764edcbedd4399ca89e14e5f212b144125c1";
+      sha512 = "95e215f4280e177c3f763c6a8ab7ff56d6e0ca4aca2ac5eec8a3be7a461257e3aba236f3d122200e031d8e75ae2486779fb89d398defeefdb52589cb98a131b4";
     };
 
     meta = {