diff --git a/flake.nix b/flake.nix
index 0211e72..337c754 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,7 +26,7 @@
             # Fix Sphinx for Python 3.10
             sphinx = if pythonVersion == "python310" then
               super.sphinx.overridePythonAttrs (old: { 
-                version = "7.2.6";  # Use a version known to work with Python 3.10
+                version = "6.2.1";  # Use a version known to work with Python 3.10
                 doCheck = false;    # Skip tests to avoid compatibility issues
               })
             else