diff --git a/.github/workflows/main-check.yml b/.github/workflows/main-check.yml
index 34072a80..11b83274 100644
--- a/.github/workflows/main-check.yml
+++ b/.github/workflows/main-check.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04]
-        python: ["3.8", "3.9", "3.10", "3.11"]
+        python: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 09046f8c..ad4fd33a 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install tools
         run: pip install wheel
       - name: Build
diff --git a/.github/workflows/validate-pr.yml b/.github/workflows/validate-pr.yml
index 9df67d52..9ba15b49 100644
--- a/.github/workflows/validate-pr.yml
+++ b/.github/workflows/validate-pr.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04]
-        python: ["3.8", "3.9", "3.10", "3.11"]
+        python: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
@@ -111,7 +111,7 @@ jobs:
     steps:
       - uses: actions/setup-python@v3
         with:
-          python-version: 3.8
+          python-version: 3.11
 
       - uses: actions/checkout@v3
         with:
diff --git a/.github/workflows/windows-subprocess-check.yml b/.github/workflows/windows-subprocess-check.yml
index b002d0c0..5e33611a 100644
--- a/.github/workflows/windows-subprocess-check.yml
+++ b/.github/workflows/windows-subprocess-check.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest]
-        python: ["3.8", "3.9", "3.10", "3.11"]
+        python: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.readthedocs.yml b/.readthedocs.yml
index 1a46ba35..ef279a28 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -15,6 +15,6 @@ formats: []
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.8
+  version: 3.11
   install:
     - requirements: docs/requirements.txt
diff --git a/substrafl/remote/register/register.py b/substrafl/remote/register/register.py
index 4de29de6..207a20a5 100644
--- a/substrafl/remote/register/register.py
+++ b/substrafl/remote/register/register.py
@@ -26,7 +26,7 @@
 
 # minimal and maximal values of Python 3 minor versions supported
 # we need to store this as integer, else "3.11" < "3.9" (string comparison)
-MINIMAL_PYTHON_VERSION = 8  # 3.8
+MINIMAL_PYTHON_VERSION = 9  # 3.9
 MAXIMAL_PYTHON_VERSION = 11  # 3.11
 
 _DEFAULT_BASE_DOCKER_IMAGE = "python:{python_version}-slim"
diff --git a/tests/installable_library/setup.py b/tests/installable_library/setup.py
index f8bee471..95b65e9c 100644
--- a/tests/installable_library/setup.py
+++ b/tests/installable_library/setup.py
@@ -7,5 +7,5 @@
     version="0.0.1",
     description="testlib",
     packages=find_packages(),
-    python_requires=">=3.8",
+    python_requires=">=3.9",
 )
diff --git a/tests/remote/register/test_register.py b/tests/remote/register/test_register.py
index 5e30f23e..0005e844 100644
--- a/tests/remote/register/test_register.py
+++ b/tests/remote/register/test_register.py
@@ -31,13 +31,13 @@ def add_function(*args):
         pass
 
 
-@pytest.mark.parametrize("version", ["2.7", "3.7", "3.18"])
+@pytest.mark.parametrize("version", ["2.7", "3.7", "3.8", "3.18"])
 def test_check_python_version(version):
     with pytest.raises(UnsupportedPythonVersionError):
         register._check_python_version(version)
 
 
-@pytest.mark.parametrize("version", ["3.8", "3.9", "3.10", "3.11"])
+@pytest.mark.parametrize("version", ["3.9", "3.10", "3.11"])
 def test_check_python_version_valid(version):
     """Does not raise for supported versions"""
     register._check_python_version(version)