diff --git a/pkgs/development/python-modules/mizani/default.nix b/pkgs/development/python-modules/mizani/default.nix
index 92ced96774e0..4e985885890a 100644
--- a/pkgs/development/python-modules/mizani/default.nix
+++ b/pkgs/development/python-modules/mizani/default.nix
@@ -1,7 +1,6 @@
 {
   lib,
   buildPythonPackage,
-  pythonOlder,
   fetchFromGitHub,
 
   # build-system
@@ -13,22 +12,20 @@
   pandas,
   scipy,
 
-  # checks
+  # tests
   pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "mizani";
-  version = "0.12.2";
+  version = "0.13.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.10";
-
   src = fetchFromGitHub {
     owner = "has2k1";
     repo = "mizani";
     rev = "refs/tags/v${version}";
-    hash = "sha256-aTc8LC/2zLrrTfOXABWs049m752PctpvlguA6qhyhp8=";
+    hash = "sha256-UzedAhYGgGLOMUyZe3ew4a2gh1UgYHaLsIe9k85rOkg=";
   };
 
   build-system = [ setuptools-scm ];
diff --git a/pkgs/development/python-modules/plotnine/default.nix b/pkgs/development/python-modules/plotnine/default.nix
index f94ac77898f3..a402babb71bc 100644
--- a/pkgs/development/python-modules/plotnine/default.nix
+++ b/pkgs/development/python-modules/plotnine/default.nix
@@ -2,31 +2,34 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  geopandas,
+
+  # build-system
+  setuptools-scm,
+
+  # dependencies
   matplotlib,
   mizani,
   pandas,
   patsy,
-  pytestCheckHook,
-  pythonOlder,
-  scikit-misc,
   scipy,
-  setuptools-scm,
   statsmodels,
+
+  # tests
+  geopandas,
+  pytestCheckHook,
+  scikit-misc,
 }:
 
 buildPythonPackage rec {
   pname = "plotnine";
-  version = "0.13.6";
+  version = "0.14.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.9";
-
   src = fetchFromGitHub {
     owner = "has2k1";
     repo = "plotnine";
     rev = "refs/tags/v${version}";
-    hash = "sha256-/yxRYK3ZTrYj+l3TQhFllyICnJjCZPd4ebNurCLZAYg=";
+    hash = "sha256-4x7euxf+G/HaqC3LVD7TCQEVcihdb/FSMqRvMWAqhgo=";
   };
 
   postPatch = ''
@@ -36,8 +39,6 @@ buildPythonPackage rec {
 
   build-system = [ setuptools-scm ];
 
-  pythonRelaxDeps = [ "mizani" ];
-
   dependencies = [
     matplotlib
     mizani