diff --git a/CHANGELOG.md b/CHANGELOG.md
index bae6b35bf2..2efeb975e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ Note that the only difference between `v2` and `v3` of the CodeQL Action is the
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Update default CodeQL bundle version to 2.16.6. [#2212](https://github.com/github/codeql-action/pull/2212)
 
 ## 3.24.9 - 22 Mar 2024
 
diff --git a/lib/defaults.json b/lib/defaults.json
index bc8dd1d217..cfe37ab152 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-v2.16.5",
-    "cliVersion": "2.16.5",
-    "priorBundleVersion": "codeql-bundle-v2.16.4",
-    "priorCliVersion": "2.16.4"
+    "bundleVersion": "codeql-bundle-v2.16.6",
+    "cliVersion": "2.16.6",
+    "priorBundleVersion": "codeql-bundle-v2.16.5",
+    "priorCliVersion": "2.16.5"
 }
diff --git a/src/defaults.json b/src/defaults.json
index be3576afe2..969ce10caf 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-v2.16.5",
-  "cliVersion": "2.16.5",
-  "priorBundleVersion": "codeql-bundle-v2.16.4",
-  "priorCliVersion": "2.16.4"
+  "bundleVersion": "codeql-bundle-v2.16.6",
+  "cliVersion": "2.16.6",
+  "priorBundleVersion": "codeql-bundle-v2.16.5",
+  "priorCliVersion": "2.16.5"
 }