diff --git a/pkgs/development/python-modules/pymc/default.nix b/pkgs/development/python-modules/pymc/default.nix
index 4ac12b51bddb5..031a08ff866e9 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 = "5.20.1";
+  version = "5.21.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "pymc-devs";
     repo = "pymc";
     tag = "v${version}";
-    hash = "sha256-Vc+yjMd5XCM97Y0JIfII+PfNz0rx1hi9N370mgBbO+8=";
+    hash = "sha256-Zn6Yyacq7k+Xzu2VwdvXl5IRZbgYUIiOkZ0Q87I/BXo=";
   };
 
   postPatch = ''
@@ -42,10 +42,6 @@ buildPythonPackage rec {
     versioneer
   ];
 
-  pythonRelaxDeps = [
-    "pytensor"
-  ];
-
   dependencies = [
     arviz
     cachetools