diff --git a/lib/defaults.json b/lib/defaults.json
index 044c1abad..cfe37ab15 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-v2.17.0",
-    "cliVersion": "2.17.0",
+    "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 c318f7890..969ce10ca 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-v2.17.0",
-  "cliVersion": "2.17.0",
+  "bundleVersion": "codeql-bundle-v2.16.6",
+  "cliVersion": "2.16.6",
   "priorBundleVersion": "codeql-bundle-v2.16.5",
   "priorCliVersion": "2.16.5"
 }