diff --git a/.github/workflows/test_and_deploy.yml b/.github/workflows/test_and_deploy.yml
index 0a99b4d..cc5f42e 100644
--- a/.github/workflows/test_and_deploy.yml
+++ b/.github/workflows/test_and_deploy.yml
@@ -27,16 +27,16 @@ jobs:
     strategy:
       matrix:
         # Run all supported Python versions on linux
-        python-version: ["3.9", "3.10", "3.11"]
         os: [ubuntu-latest]
-        # Include one windows and macos run
+        python-version: ["3.10", "3.11", "3.12"]
+        # Include one windows and two macOS (intel based and arm based) runs
         include:
-        - os: macos-13 # Intel Mac
-          python-version: "3.10"
-        - os: macos-latest # ARM Mac
-          python-version: "3.10"
-        - os: windows-latest
-          python-version: "3.10"
+          - os: macos-13
+            python-version: "3.12"
+          - os: macos-latest
+            python-version: "3.12"
+          - os: windows-latest
+            python-version: "3.12"
 
     steps:
       - name: Cache brainglobe directory
diff --git a/brainglobe_heatmap/planner.py b/brainglobe_heatmap/planner.py
index 100ebdf..242d73f 100644
--- a/brainglobe_heatmap/planner.py
+++ b/brainglobe_heatmap/planner.py
@@ -91,13 +91,16 @@ def show(self):
             (self.slicer.plane0, self.slicer.plane1),
             (blue_dark, pink_dark),
             (0.8, 0.3),
+            strict=False,
         ):
             plane_mesh = plane.to_mesh(self.scene.root)
             plane_mesh.alpha(alpha).color(color)
 
             self.scene.add(plane_mesh, transform=False)
             for vector, v_color in zip(
-                (plane.normal, plane.u, plane.v), (color, red_dark, green_dark)
+                (plane.normal, plane.u, plane.v),
+                (color, red_dark, green_dark),
+                strict=False,
             ):
                 self.scene.add(
                     Arrow(
diff --git a/pyproject.toml b/pyproject.toml
index b5816fc..bba3d71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "brainglobe-heatmap"
 authors = [{ name = "Federico Claudi", email = "hello@brainglobe.info" }]
 description = "Rendering anatomical heatmaps with brainrender and matplotlib"
 readme = "README.md"
-requires-python = ">=3.9.0"
+requires-python = ">=3.10"
 dynamic = ["version"]
 
 dependencies = ["brainrender", "matplotlib", "numpy", "myterial", "rich"]
@@ -14,9 +14,9 @@ classifiers = [
     "Development Status :: 2 - Pre-Alpha",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Operating System :: OS Independent",
     "License :: OSI Approved :: MIT License",
 ]
@@ -57,7 +57,7 @@ exclude = ["tests*"]
 addopts = "--cov=brainglobe_heatmap"
 
 [tool.black]
-target-version = ['py39', 'py310', 'py311']
+target-version = ['py310','py311', 'py312']
 skip-string-normalization = false
 line-length = 79
 
@@ -83,14 +83,14 @@ select = ["I", "E", "F", "B"]
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = py{39,310,311}
+envlist = py{310,311,312}
 isolated_build = True
 
 [gh-actions]
 python =
-    3.9: py39
     3.10: py310
     3.11: py311
+    3.12: py312
 
 [testenv]
 extras =