diff --git a/.github/workflows/deploy_manylinux2010_x86_64.yml b/.github/workflows/deploy_manylinux2010_x86_64.yml
index 5d633f12f..8074e735b 100644
--- a/.github/workflows/deploy_manylinux2010_x86_64.yml
+++ b/.github/workflows/deploy_manylinux2010_x86_64.yml
@@ -19,7 +19,7 @@ jobs:
           CIBW_ARCHS_LINUX: "x86_64"
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2010
           # cp310 is deployed for manylinux2014
-          CIBW_BUILD: cp38-* cp39-*
+          CIBW_BUILD: cp39-*
       - name: Upload manylinux2010_x86_64 wheels to PyPI
         env:
           TWINE_USERNAME: ${{ secrets.TWINE_USERNAME }}
diff --git a/.github/workflows/deploy_manylinux2014_aarch64.yml b/.github/workflows/deploy_manylinux2014_aarch64.yml
index 4bd7d6eee..7fa730784 100644
--- a/.github/workflows/deploy_manylinux2014_aarch64.yml
+++ b/.github/workflows/deploy_manylinux2014_aarch64.yml
@@ -19,7 +19,7 @@ jobs:
           CIBW_BEFORE_BUILD: "pip install setuptools wheel cython"
           CIBW_ARCHS_LINUX: "aarch64"
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
-          CIBW_BUILD: cp38-* cp39-* cp310-* cp311-* cp312-*
+          CIBW_BUILD: cp39-* cp310-* cp311-* cp312-*
       - name: Upload manylinux2014_aarch64 wheels to PyPI
         env:
           TWINE_USERNAME: ${{ secrets.TWINE_USERNAME }}
diff --git a/.github/workflows/deploy_win_macos.yml b/.github/workflows/deploy_win_macos.yml
index a702663e6..9a6be995a 100644
--- a/.github/workflows/deploy_win_macos.yml
+++ b/.github/workflows/deploy_win_macos.yml
@@ -27,7 +27,7 @@ jobs:
         CIBW_ARCHS_WINDOWS: "AMD64"
         CIBW_ARCHS_MACOS: "x86_64 arm64 universal2"
         # Does not fail at unsupported Python versions!
-        CIBW_BUILD: cp38-* cp39-* cp310-* cp311-* cp312-*
+        CIBW_BUILD: cp39-* cp310-* cp311-* cp312-*
     - name: Upload wheels
       env:
         TWINE_USERNAME: ${{ secrets.TWINE_USERNAME }}
diff --git a/.github/workflows/testcext.yml b/.github/workflows/testcext.yml
index 78a5117d3..c5f14d192 100644
--- a/.github/workflows/testcext.yml
+++ b/.github/workflows/testcext.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12-dev']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 5cd81a487..016f4ee0f 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12-dev', 'pypy-3.9']
+        python-version: ['3.9', '3.10', '3.11', '3.12', 'pypy-3.9']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/notes/pages/EZDXF.md b/notes/pages/EZDXF.md
index 225b567b6..b21ca8284 100644
--- a/notes/pages/EZDXF.md
+++ b/notes/pages/EZDXF.md
@@ -11,7 +11,7 @@
 		- R2018
 	- [[MIT-License]]
 	  id:: 654fc96e-5aa7-49f9-b70e-45c3f2867976
-	- requires Python 3.8 or newer
+	- requires Python 3.9 or newer
 	  id:: 65509c8d-91b9-4461-886f-6d771ce566ea
 	- works with [[CPython]] and [[PyPy]]
 	- OS independent
diff --git a/notes/pages/IDEAS.md b/notes/pages/IDEAS.md
index 28cdf52c5..c4dd66413 100644
--- a/notes/pages/IDEAS.md
+++ b/notes/pages/IDEAS.md
@@ -156,13 +156,10 @@
 		  or longest path will be taken.
 		- A gap tolerance is given by the user to connect end points that are not coincident and the algorithm adds connection lines between these gaps.
 		-
-- # DXF Document
-	- LATER copy DXF document by serializing and reloading the document in memory or by file-system, this is not efficient but safe.
-	-
 - # Increase Minimal Required Python Version
 	- In general `numpy` defines the minimal required Python version.
 	-
-	- Python 3.9 in late 2023, after release of Python 3.12 - done in v1.2.0
+	- Python 3.9 for v1.2.0 and later
 		- https://docs.python.org/3/whatsnew/3.9.html
 		- type hinting generics in standard collections
 			- `dict[tuple[int, str], list[str]]` can be used in regular code outside of annotations, import of `List`, `Dict` or `Tuple` is not required anymore