diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22507465b..f43b8573e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
+- Update default CodeQL bundle version to 2.15.1. [#1953](https://github.com/github/codeql-action/pull/1953)
 - Users will begin to see warnings on Node.js 16 deprecation in their Actions logs on code scanning runs starting October 23, 2023.
   - All code scanning workflows should continue to succeed regardless of the warning.
   - The team at GitHub maintaining the CodeQL Action is aware of the deprecation timeline and actively working on creating another version of the CodeQL Action, v3, that will bump us to Node 20.
diff --git a/lib/defaults.json b/lib/defaults.json
index 035833da8..977a88f96 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-v2.15.0",
-    "cliVersion": "2.15.0",
-    "priorBundleVersion": "codeql-bundle-v2.14.6",
-    "priorCliVersion": "2.14.6"
+    "bundleVersion": "codeql-bundle-v2.15.1",
+    "cliVersion": "2.15.1",
+    "priorBundleVersion": "codeql-bundle-v2.15.0",
+    "priorCliVersion": "2.15.0"
 }
diff --git a/src/defaults.json b/src/defaults.json
index 89b5f5faa..52ce5f795 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-v2.15.0",
-  "cliVersion": "2.15.0",
-  "priorBundleVersion": "codeql-bundle-v2.14.6",
-  "priorCliVersion": "2.14.6"
+  "bundleVersion": "codeql-bundle-v2.15.1",
+  "cliVersion": "2.15.1",
+  "priorBundleVersion": "codeql-bundle-v2.15.0",
+  "priorCliVersion": "2.15.0"
 }