diff --git a/pkgs/development/python-modules/pybase64/default.nix b/pkgs/development/python-modules/pybase64/default.nix
index d5de3d7dcd95..6f58d6d37199 100644
--- a/pkgs/development/python-modules/pybase64/default.nix
+++ b/pkgs/development/python-modules/pybase64/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "pybase64";
-  version = "1.4.2";
+  version = "1.4.3";
   pyproject = true;
 
   src = fetchFromGitHub {
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     repo = "pybase64";
     tag = "v${version}";
     fetchSubmodules = true;
-    hash = "sha256-VSCMBKyDgNjwRUvT29z3KdN/dReqbmaaNeWomnyFJFg=";
+    hash = "sha256-cR8Ht6QbHXCED86xCbiLg4bxt1Hkv4Ota7R+voZE3yo=";
   };
 
   build-system = [ setuptools ];