diff --git a/pkgs/development/python-modules/pyasn1/default.nix b/pkgs/development/python-modules/pyasn1/default.nix
index 8037796713e..09015e7d04a 100644
--- a/pkgs/development/python-modules/pyasn1/default.nix
+++ b/pkgs/development/python-modules/pyasn1/default.nix
@@ -3,11 +3,11 @@
 buildPythonPackage rec {
   name = "${pname}-${version}";
   pname = "pyasn1";
-  version = "0.4.2";
+  version = "0.4.3";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d258b0a71994f7770599835249cece1caef3c70def868c4915e6e5ca49b67d15";
+    sha256 = "fb81622d8f3509f0026b0683fe90fea27be7284d3826a5f2edf97f69151ab0fc";
   };
 
   meta = with stdenv.lib; {