diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 07d95a18e..72f14f30f 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -51,7 +51,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     name: "Test SDK on py${{ matrix.python-version }} x ${{ matrix.os }} "
     runs-on: ${{ matrix.os }}
     steps:
@@ -78,7 +78,7 @@ jobs:
         options: --health-cmd "rabbitmq-diagnostics -q check_running && rabbitmq-diagnostics -q check_virtual_hosts && rabbitmq-diagnostics -q check_port_connectivity" --health-interval 10s --health-timeout 5s --health-retries 5
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     name: "Test Endpoint on py${{ matrix.python-version }} x ${{ matrix.os }} "
     steps:
       - uses: actions/checkout@v4
diff --git a/changelog.d/20241111_160525_chris_new_pythons.rst b/changelog.d/20241111_160525_chris_new_pythons.rst
index a312847b0..f7b284ea9 100644
--- a/changelog.d/20241111_160525_chris_new_pythons.rst
+++ b/changelog.d/20241111_160525_chris_new_pythons.rst
@@ -2,4 +2,4 @@ New Functionality
 ^^^^^^^^^^^^^^^^^
 
 - The ``globus-compute-sdk`` and ``globus-compute-endpoint`` packages now support
-  Python versions 3.12 and 3.13.
+  Python version 3.12.
diff --git a/compute_endpoint/tox.ini b/compute_endpoint/tox.ini
index f19d2f558..d5a85fed9 100644
--- a/compute_endpoint/tox.ini
+++ b/compute_endpoint/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{313,312,311,310,39}
+envlist = py{312,311,310,39}
 skip_missing_interpreters = true
 
 [testenv]
diff --git a/compute_sdk/tox.ini b/compute_sdk/tox.ini
index 49342d8f1..b9e1a5006 100644
--- a/compute_sdk/tox.ini
+++ b/compute_sdk/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{313,312,311,310,39}
+envlist = py{312,311,310,39}
 skip_missing_interpreters = true
 
 [testenv]