diff --git a/.github/renovate.json b/.github/renovate.json
index aba7334..5986c23 100644
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -2,5 +2,32 @@
     "$schema": "https://docs.renovatebot.com/renovate-schema.json",
     "extends": [
         "local>ni/python-renovate-config:recommended"
+    ],
+    "customManagers": [
+        {
+            "description": "Update setup-python default Python version.",
+            "customType": "regex",
+            "managerFilePatterns": [
+                "/^setup-python\\/(?:action.yml|README.md)$/"
+            ],
+            "matchStrings": [
+                "default\\s*:\\s*[\"']?(?<currentValue>.+?)[\"']?\\s",
+                "By default, this action installs Python (?<currentValue>.+?)\\.\\s"
+            ],
+            "matchStringsStrategy": "any",
+            "datasourceTemplate": "python-version",
+            "depNameTemplate": "python",
+            "versioningTemplate": "python"
+        }
+    ],
+    "packageRules": [
+        {
+            "description": "Update setup-python default Python version to latest 3.13.x.",
+            "matchDepNames": [
+                "python"
+            ],
+            "allowedVersions": "< 3.14.0",
+            "minimumReleaseAge": "3 days"
+        }
     ]
 }
\ No newline at end of file
diff --git a/setup-python/README.md b/setup-python/README.md
index c3aa447..53db8b8 100644
--- a/setup-python/README.md
+++ b/setup-python/README.md
@@ -5,7 +5,7 @@ The `ni/python-actions/setup-python` action installs Python and adds it to the P
 It is a thin wrapper for https://github.com/actions/setup-python which is intended to
 single-source the default Python version for multiple NI Python projects.
 
-By default, this action installs Python 3.11.9.
+By default, this action installs Python 3.13.17.
 
 ## Usage
 
diff --git a/setup-python/action.yml b/setup-python/action.yml
index bf408f0..e8cc721 100644
--- a/setup-python/action.yml
+++ b/setup-python/action.yml
@@ -2,7 +2,7 @@ name: Set up Python
 description: Install Python with appropriate defaults for NI Python projects.
 inputs:
   python-version:
-    default: 3.11.9
+    default: 3.13.17
 outputs:
   python-path:
     value: ${{ steps.setup-python.outputs.python-path }}