diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ad5675f..c7fae21 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
         os:
           ["ubuntu-22.04"] # "windows-2025" # Disabled until solution/workaround for NVTX is present
           # "ubuntu-24.04" # Postponed as long as testing against CUDA 12.1, needs 12.6+
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.10", "3.11", "3.12", "3.13"]
 
     name: "${{ matrix.os }} / Python ${{ matrix.python }}"
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 1ee68c1..7b4f86f 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.10", "3.11", "3.12", "3.13"]
 
     name: "Python ${{ matrix.python }}"
     runs-on: ubuntu-24.04
diff --git a/README.md b/README.md
index 6f54af6..be65af2 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ In particular, torchhull is a GPU implementation of the following paper:
 
 torchhull requires the following prerequites (for JIT compilation):
 
-- Python >= 3.9
+- Python >= 3.10
 - CUDA >= 12.1
 - C++17 compiler
 
diff --git a/noxfile.py b/noxfile.py
index 667102a..fa8f904 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -71,7 +71,9 @@ def docs_live(session: nox.Session) -> None:
     # sphinx-build
     force_building = "-E"
     watch_dirs_and_files = ["src", "README.md", "CHANGELOG.md"]
-    watch_args = [v for pair in zip(["--watch"] * len(watch_dirs_and_files), watch_dirs_and_files) for v in pair]
+    watch_args = [
+        v for pair in zip(["--watch"] * len(watch_dirs_and_files), watch_dirs_and_files, strict=True) for v in pair
+    ]
     session.run(
         "sphinx-autobuild",
         "-b",
diff --git a/pyproject.toml b/pyproject.toml
index 511c3b4..59ac7f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ version = "0.2.0"
 authors = [{ name = "Patrick Stotko", email = "stotko@cs.uni-bonn.de" }]
 description = "A fast Visual Hull implementation"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = ["torch", "charonload"]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -13,7 +13,6 @@ classifiers = [
     "Programming Language :: C++",
     "Environment :: GPU :: NVIDIA CUDA",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -84,7 +83,7 @@ line-length = 120
 [tool.isort]
 profile = "black"
 multi_line_output = 3
-py_version = 39
+py_version = 310
 
 
 [tool.docformatter]