diff --git a/pkgs/development/python-modules/pymc/default.nix b/pkgs/development/python-modules/pymc/default.nix
index e8a1a72cc91e..603136c65a22 100644
--- a/pkgs/development/python-modules/pymc/default.nix
+++ b/pkgs/development/python-modules/pymc/default.nix
@@ -22,14 +22,14 @@
 
 buildPythonPackage rec {
   pname = "pymc";
-  version = "5.19.1";
+  version = "5.20.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "pymc-devs";
     repo = "pymc";
     tag = "v${version}";
-    hash = "sha256-Tx3liE/MLInEfNMc7e+YtvXg/hOsfOyJq6FwfmAIwz0=";
+    hash = "sha256-5iHm+q4ykXhCntUpZmEfZc1805+GoCQR3yrkQGJ2qQg=";
   };
 
   postPatch = ''
@@ -64,7 +64,7 @@ buildPythonPackage rec {
   meta = {
     description = "Bayesian estimation, particularly using Markov chain Monte Carlo (MCMC)";
     homepage = "https://github.com/pymc-devs/pymc";
-    changelog = "https://github.com/pymc-devs/pymc/releases/tag/v${version}";
+    changelog = "https://github.com/pymc-devs/pymc/releases/tag/${src.tag}";
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [
       nidabdella