diff --git a/pkgs/development/python-modules/isbnlib/default.nix b/pkgs/development/python-modules/isbnlib/default.nix
index 012bab56ab6..10d57d7264b 100644
--- a/pkgs/development/python-modules/isbnlib/default.nix
+++ b/pkgs/development/python-modules/isbnlib/default.nix
@@ -7,11 +7,11 @@
 
 buildPythonPackage rec {
   pname = "isbnlib";
-  version = "3.9.5";
+  version = "3.9.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f500a0561b83a2982d3424d640243d05bda9716f4fe9a655e331f3a07ca02710";
+    sha256 = "d4ae098cb31d6c678a6eac074a24f8ba4adfe7df65db13b0b2ab7355f28d6e3b";
   };
 
   checkInputs = [