diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22507465b6..f43b8573ed 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 035833da85..977a88f963 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 89b5f5faa0..52ce5f7957 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"
 }