diff --git a/.github/workflows/1_create_release_pr.yml b/.github/workflows/1_create_release_pr.yml
index ec5e46d9..e1b25068 100644
--- a/.github/workflows/1_create_release_pr.yml
+++ b/.github/workflows/1_create_release_pr.yml
@@ -31,8 +31,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          # return to 3.x once cylc-flow is compatible with 3.10+ (pyuv)
-          python-version: '3.9'
+          python-version: '3'
 
       - name: Create & checkout PR branch
         uses: cylc/release-actions/stage-1/checkout-pr-branch@v1
diff --git a/.github/workflows/2_auto_publish_release.yml b/.github/workflows/2_auto_publish_release.yml
index ca6d9c06..f28b1ee4 100644
--- a/.github/workflows/2_auto_publish_release.yml
+++ b/.github/workflows/2_auto_publish_release.yml
@@ -29,8 +29,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        # return to 3.x once cylc-flow is compatible with 3.10+ (pyuv)
-        python-version: '3.9'
+        python-version: '3'
 
     - name: Get the version number
       uses: cylc/release-actions/stage-2/get-version-from-pr@v1
diff --git a/setup.cfg b/setup.cfg
index f0bd5efc..160048de 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,6 +34,10 @@ classifiers =
     Operating System :: POSIX
     Programming Language :: Python
     Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: Implementation :: CPython