diff --git a/pkgs/development/python-modules/pymc/default.nix b/pkgs/development/python-modules/pymc/default.nix
index 06d177b851b9..e8a1a72cc91e 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 = "5.18.2";
+  version = "5.19.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "pymc-devs";
     repo = "pymc";
-    rev = "refs/tags/v${version}";
-    hash = "sha256-JA5xBoqNC6F97Obs+0ig/ALw1rkUVX7A0bStKHS+uv4=";
+    tag = "v${version}";
+    hash = "sha256-Tx3liE/MLInEfNMc7e+YtvXg/hOsfOyJq6FwfmAIwz0=";
   };
 
   postPatch = ''