diff --git a/.github/actions/bootstrap/action.yml b/.github/actions/bootstrap/action.yml
index 4cde8dddfa3f..a8a98acdf304 100644
--- a/.github/actions/bootstrap/action.yml
+++ b/.github/actions/bootstrap/action.yml
@@ -3,7 +3,7 @@ description: "Bootstrap Python environment (install and configure Python version
 inputs:
   python-version:
     description: "Version range or exact version of Python or PyPy to use, using SemVer's version range syntax."
-    default: 3.8
+    default: 3.9
   pip-version:
     description: "Version of pip to be installed using pip"
     default: 24.1.2
diff --git a/.github/workflows/cache-cleanup.yml b/.github/workflows/cache-cleanup.yml
index aa2da65d0a47..dca5505f7bf6 100644
--- a/.github/workflows/cache-cleanup.yml
+++ b/.github/workflows/cache-cleanup.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Cleanup caches by directories
         # Only keep caches that match the latest keys for each directory
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 815d6422848b..aba3726017fd 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -127,7 +127,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install build tools
         run: |
             python -m pip install -U pip==23.3.1
diff --git a/e2e/strategies/pyproject.toml b/e2e/strategies/pyproject.toml
index 5cc74b20fa24..3ad62ec836a7 100644
--- a/e2e/strategies/pyproject.toml
+++ b/e2e/strategies/pyproject.toml
@@ -9,7 +9,7 @@ description = "Keras Federated Learning Quickstart with Flower"
 authors = ["The Flower Authors <hello@flower.ai>"]
 
 [tool.poetry.dependencies]
-python = ">=3.8,<3.11"
+python = ">=3.9,<3.11"
 flwr = { path = "../../", develop = true, extras = ["simulation"] }
 tensorflow-cpu = "^2.9.1, !=2.11.1"
 tensorflow-io-gcs-filesystem = "<0.35.0"