diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9630bab..c1f172a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ jobs:
     name: Test
     strategy:
       matrix:
-        python-version: ["3.9.x", "3.10.x", "3.11.x", "3.12.x"]
+        python-version: ["3.10.x", "3.11.x", "3.12.x", "3.13.x"]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -54,7 +54,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.9.x"
+          python-version: "3.10.x"
 
       - name: Publish release
         run: |
diff --git a/poetry.lock b/poetry.lock
index 141252a..97a7bb6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.0.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.1.1 and should not be changed by hand.
 
 [[package]]
 name = "black"
@@ -482,12 +482,12 @@ files = [
 ]
 
 [package.extras]
-brotli = ["brotli (>=1.0.9)", "brotlicffi (>=0.8.0)"]
+brotli = ["brotli (>=1.0.9) ; platform_python_implementation == \"CPython\"", "brotlicffi (>=0.8.0) ; platform_python_implementation != \"CPython\""]
 h2 = ["h2 (>=4,<5)"]
 socks = ["pysocks (>=1.5.6,!=1.5.7,<2.0)"]
 zstd = ["zstandard (>=0.18.0)"]
 
 [metadata]
 lock-version = "2.1"
-python-versions = ">=3.9"
-content-hash = "d1b0f1234dd8793b9c632875b5996006468f0a86d72d71d67733b1c8fbefc652"
+python-versions = ">=3.10"
+content-hash = "dcf33b9b7017ec16f7f04b61fc271af40732b3ceea849e8db472bdbc1296fd4c"
diff --git a/pyproject.toml b/pyproject.toml
index f124cd0..143ffd7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,14 +14,12 @@ classifiers=[
     'License :: OSI Approved :: BSD License',
     'Programming Language :: Python :: 3',
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "requests >= 2.32.0",
     "iso8601 >= 0.1.13",
 ]
 
-
-
 [tool.poetry]
 packages = [
     { include = "temba_client" },