diff --git a/pkgs/development/python-modules/sphinx-tabs/default.nix b/pkgs/development/python-modules/sphinx-tabs/default.nix
index 6360e943dd6b..dc2677f13bf1 100644
--- a/pkgs/development/python-modules/sphinx-tabs/default.nix
+++ b/pkgs/development/python-modules/sphinx-tabs/default.nix
@@ -17,9 +17,9 @@
   beautifulsoup4,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage {
   pname = "sphinx-tabs";
-  version = "3.4.7";
+  version = "3.4.7-unstable-2026-01-24";
   pyproject = true;
 
   outputs = [
@@ -30,8 +30,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "executablebooks";
     repo = "sphinx-tabs";
-    tag = "v${version}";
-    hash = "sha256-bJXm3qMT1y7NqUA0iiEUA+USTWHxdV8tbEEiDrQKk1U=";
+    rev = "d613cb7b6bff083227e35e9b3a4c56b24f6c6ad4";
+    hash = "sha256-aYlc9bs37Mu4Beuggx0dgVdoRa+X65oDNnYg3Wa4dgc=";
   };
 
   nativeBuildInputs = [