diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index e412ef9..3ed790b 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
     - uses: actions/checkout@v4
@@ -43,7 +43,8 @@ jobs:
     # Install and run the durabletask-go sidecar for running e2e tests
     - name: Pytest e2e tests
       run: |
-        go install github.com/dapr/durabletask-go@main
+        # TODO: use dapr run instead of durabletask-go as it provides a more reliable sidecar behaviorfor e2e tests  
+        go install github.com/dapr/durabletask-go@main        
         durabletask-go --port 4001 &
         tox -e py${{ matrix.python-version }}-e2e
   publish:
diff --git a/pyproject.toml b/pyproject.toml
index 575bc4a..6626bc2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = {file = "LICENSE"}
 readme = "README.md"
 dependencies = [
@@ -62,7 +62,7 @@ dev = [
 ]
 
 [tool.ruff]
-target-version = "py310" # TODO: update to py310 when we drop support for py39
+target-version = "py310"
 line-length = 100
 extend-exclude = [".github", "durabletask/internal/orchestrator_service_*.*"]
 
diff --git a/tox.ini b/tox.ini
index e035797..9b21313 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 skipsdist = True
 minversion = 3.10.0
 envlist =
-    py{39,310,311,312,313,314}
+    py{310,311,312,313,314}
     ruff,
     mypy,
 # TODO: switch runner to uv (tox-uv plugin)
@@ -10,7 +10,7 @@ runner = virtualenv
 
 [testenv]
 # you can run tox with the e2e pytest marker using tox factors:
-#   tox -e py39,py310,py311,py312,py313,py314 -- e2e
+#   tox -e py310,py311,py312,py313,py314 -- e2e
 # or single one with:
 #   tox -e py310-e2e
 # to use custom grpc endpoint and not capture print statements (-s arg in pytest):