diff --git a/pkgs/development/python-modules/asn1/default.nix b/pkgs/development/python-modules/asn1/default.nix
index b5eb64ccf9a5..4729a5712656 100644
--- a/pkgs/development/python-modules/asn1/default.nix
+++ b/pkgs/development/python-modules/asn1/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage rec {
   pname = "asn1";
-  version = "2.8.0";
+  version = "3.1.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "andrivet";
     repo = "python-asn1";
     tag = "v${version}";
-    hash = "sha256-DLKfdQzYLhfaIEPPymTzRqj3+L/fsm5Jh8kqud/ezfw=";
+    hash = "sha256-yDX2TydMtqIE4A4QUmKPJKLM1UdXxp0qFBJx08Ri2YQ=";
   };
 
   build-system = [ setuptools ];
@@ -31,7 +31,7 @@ buildPythonPackage rec {
   meta = {
     description = "Python ASN.1 encoder and decoder";
     homepage = "https://github.com/andrivet/python-asn1";
-    changelog = "https://github.com/andrivet/python-asn1/blob/v${version}/CHANGELOG.rst";
+    changelog = "https://github.com/andrivet/python-asn1/blob/${src.tag}/CHANGELOG.rst";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };