diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a391d9930..2581c240e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Update default CodeQL bundle version to 2.20.6. [#2793](https://github.com/github/codeql-action/pull/2793)
 
 ## 3.28.10 - 21 Feb 2025
 
diff --git a/lib/defaults.json b/lib/defaults.json
index eb86ae86c0..db9c2a27c5 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-v2.20.5",
-    "cliVersion": "2.20.5",
-    "priorBundleVersion": "codeql-bundle-v2.20.4",
-    "priorCliVersion": "2.20.4"
+    "bundleVersion": "codeql-bundle-v2.20.6",
+    "cliVersion": "2.20.6",
+    "priorBundleVersion": "codeql-bundle-v2.20.5",
+    "priorCliVersion": "2.20.5"
 }
diff --git a/src/defaults.json b/src/defaults.json
index c23048c950..df95e81144 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-v2.20.5",
-  "cliVersion": "2.20.5",
-  "priorBundleVersion": "codeql-bundle-v2.20.4",
-  "priorCliVersion": "2.20.4"
+  "bundleVersion": "codeql-bundle-v2.20.6",
+  "cliVersion": "2.20.6",
+  "priorBundleVersion": "codeql-bundle-v2.20.5",
+  "priorCliVersion": "2.20.5"
 }