diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e5937a430..f5070443df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ Note that the only difference between `v2` and `v3` of the CodeQL Action is the
   Starting November 30, 2024, GitHub.com customers will [no longer be able to use `actions/download-artifact@v3`](https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/). Therefore, to avoid breakage, customers who programmatically download the CodeQL Action debug artifacts should set the `CODEQL_ACTION_ARTIFACT_V4_UPGRADE` environment variable to `true` and bump `actions/download-artifact@v3` to `actions/download-artifact@v4` in their workflows. The CodeQL Action will enable this behavior by default in early November and workflows that have not yet bumped to `actions/download-artifact@v3` to `actions/download-artifact@v4` will begin failing then.
   
   This change is currently unavailable for GitHub Enterprise Server customers, as `actions/upload-artifact@v4` and `actions/download-artifact@v4` are not yet compatible with GHES. 
+- Update default CodeQL bundle version to 2.19.1. [#2519](https://github.com/github/codeql-action/pull/2519)
 
 ## 3.26.10 - 30 Sep 2024
 
diff --git a/lib/defaults.json b/lib/defaults.json
index b017c6db24..4314c67e25 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-v2.19.0",
-    "cliVersion": "2.19.0",
-    "priorBundleVersion": "codeql-bundle-v2.18.4",
-    "priorCliVersion": "2.18.4"
+    "bundleVersion": "codeql-bundle-v2.19.1",
+    "cliVersion": "2.19.1",
+    "priorBundleVersion": "codeql-bundle-v2.19.0",
+    "priorCliVersion": "2.19.0"
 }
diff --git a/src/defaults.json b/src/defaults.json
index ca0e183498..b0e2603c75 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-v2.19.0",
-  "cliVersion": "2.19.0",
-  "priorBundleVersion": "codeql-bundle-v2.18.4",
-  "priorCliVersion": "2.18.4"
+  "bundleVersion": "codeql-bundle-v2.19.1",
+  "cliVersion": "2.19.1",
+  "priorBundleVersion": "codeql-bundle-v2.19.0",
+  "priorCliVersion": "2.19.0"
 }