diff --git a/.github/workflows/python-build.yml b/.github/workflows/python-build.yml
index 0ef95123..71c94591 100644
--- a/.github/workflows/python-build.yml
+++ b/.github/workflows/python-build.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11']
+        python-version: ['3.10', '3.11', '3.12']
         os: [macos-latest, windows-latest]
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/python-stylecheck.yml b/.github/workflows/python-stylecheck.yml
index ab0a8e28..b9b14b0a 100644
--- a/.github/workflows/python-stylecheck.yml
+++ b/.github/workflows/python-stylecheck.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.9']
+        python-version: ['3.10']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/python-unittests.yml b/.github/workflows/python-unittests.yml
index 1e5a85c6..7cc45b45 100644
--- a/.github/workflows/python-unittests.yml
+++ b/.github/workflows/python-unittests.yml
@@ -16,7 +16,7 @@ jobs:
     continue-on-error: true
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11']
+        python-version: ['3.10', '3.11', '3.12']
         os: [macos-latest, windows-latest, ubuntu-latest]
     steps:
     - uses: actions/checkout@v4
diff --git a/.readthedocs.yml b/.readthedocs.yml
index 8b3d25e7..09511140 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -3,7 +3,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: 3.9
+    python: 3.10
 
 python:
   install:
diff --git a/template/tempita.py b/template/tempita.py
index e78e384e..a8558a42 100644
--- a/template/tempita.py
+++ b/template/tempita.py
@@ -8,7 +8,6 @@
 
 from Cython import Tempita as tempita
 
-
 TEMPLATE_ROOT_PATH = os.path.dirname(pkgutil.get_loader("template").get_filename())
 TEMPLATES_PATH = os.path.join(TEMPLATE_ROOT_PATH, "templates")
 SRC_PATH = os.path.join(TEMPLATE_ROOT_PATH, "src")
diff --git a/tests/tags/abstract_base_tag.py b/tests/tags/abstract_base_tag.py
index d3ce096e..76639b1d 100644
--- a/tests/tags/abstract_base_tag.py
+++ b/tests/tags/abstract_base_tag.py
@@ -16,7 +16,6 @@
     CompoundTag,
 )
 
-
 TagNameMap = {
     ByteTag: "byte",
     ShortTag: "short",