diff --git a/pkgs/development/python-modules/bsdiff4/default.nix b/pkgs/development/python-modules/bsdiff4/default.nix
index 339e649c53af..5687e9c7bf7a 100644
--- a/pkgs/development/python-modules/bsdiff4/default.nix
+++ b/pkgs/development/python-modules/bsdiff4/default.nix
@@ -6,11 +6,11 @@
 
 buildPythonPackage rec {
   pname = "bsdiff4";
-  version = "1.2.0";
+  version = "1.2.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "17fc0dd4204x5gqapvbrc4kv83jdajs00jxm739586pl0iapybrw";
+    sha256 = "87cffc7522effdda03fd1564b212ad2279c0af50d16c3e65776f80acb6705d4b";
   };
 
   checkPhase = ''