diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13858fe4dc..4f81df203e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## [UNRELEASED]
 
+- Update default CodeQL bundle version to 2.13.4. [#1721](https://github.com/github/codeql-action/pull/1721)
 - Experimental: add a new `resolve-environment` action which attempts to infer a configuration for the build environment that is required to build a given project. Do not use this in production as it is part of an internal experiment and subject to change at any time.
 
 ## 2.20.0 - 13 Jun 2023
diff --git a/lib/defaults.json b/lib/defaults.json
index 4ca5e0aedc..fb74b1b46e 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-20230524",
-    "cliVersion": "2.13.3",
-    "priorBundleVersion": "codeql-bundle-20230428",
-    "priorCliVersion": "2.13.1"
+    "bundleVersion": "codeql-bundle-v2.13.4",
+    "cliVersion": "2.13.4",
+    "priorBundleVersion": "codeql-bundle-20230524",
+    "priorCliVersion": "2.13.3"
 }
diff --git a/src/defaults.json b/src/defaults.json
index fe0271b362..49aeca5db0 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-20230524",
-  "cliVersion": "2.13.3",
-  "priorBundleVersion": "codeql-bundle-20230428",
-  "priorCliVersion": "2.13.1"
+  "bundleVersion": "codeql-bundle-v2.13.4",
+  "cliVersion": "2.13.4",
+  "priorBundleVersion": "codeql-bundle-20230524",
+  "priorCliVersion": "2.13.3"
 }