diff --git a/extensions/ql-vscode/supported_cli_versions.json b/extensions/ql-vscode/supported_cli_versions.json
index 7c7d6b4cb12..82c2806ff0f 100644
--- a/extensions/ql-vscode/supported_cli_versions.json
+++ b/extensions/ql-vscode/supported_cli_versions.json
@@ -1,4 +1,5 @@
 [
+  "v2.21.0",
   "v2.20.7",
   "v2.19.4",
   "v2.18.4",