diff --git a/pkgs/development/python-modules/amazon-ion/default.nix b/pkgs/development/python-modules/amazon-ion/default.nix
index 38ab7513074e..a7569cd5d06a 100644
--- a/pkgs/development/python-modules/amazon-ion/default.nix
+++ b/pkgs/development/python-modules/amazon-ion/default.nix
@@ -14,7 +14,7 @@
 
 buildPythonPackage rec {
   pname = "amazon-ion";
-  version = "0.12.0";
+  version = "0.13.0";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -25,7 +25,7 @@ buildPythonPackage rec {
     tag = "v${version}";
     # Test vectors require git submodule
     fetchSubmodules = true;
-    hash = "sha256-L21FYl4Q+nhB3CU1maOxBHSLU+ox1POHtMio8SSZ/r0=";
+    hash = "sha256-ZnslVmXE2YvTAkpfw2lbpB+uF85n/CvA22htO/Y7yWk=";
   };
 
   postPatch = ''
@@ -62,7 +62,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python implementation of Amazon Ion";
     homepage = "https://github.com/amazon-ion/ion-python";
-    changelog = "https://github.com/amazon-ion/ion-python/releases/tag/v${version}";
+    changelog = "https://github.com/amazon-ion/ion-python/releases/tag/${src.tag}";
     sourceProvenance = with sourceTypes; [
       fromSource
       binaryNativeCode