diff --git a/extensions/ql-vscode/supported_cli_versions.json b/extensions/ql-vscode/supported_cli_versions.json
index 14d20d6107e..efa42444a0c 100644
--- a/extensions/ql-vscode/supported_cli_versions.json
+++ b/extensions/ql-vscode/supported_cli_versions.json
@@ -1,4 +1,5 @@
 [
+  "v2.23.9",
   "v2.21.3",
   "v2.20.7",
   "v2.19.4",