diff --git a/extensions/ql-vscode/package-lock.json b/extensions/ql-vscode/package-lock.json
index 0f04ae717fb..b06f3d15adb 100644
--- a/extensions/ql-vscode/package-lock.json
+++ b/extensions/ql-vscode/package-lock.json
@@ -16950,9 +16950,9 @@
       "dev": true
     },
     "node_modules/immutable": {
-      "version": "5.1.1",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.1.1.tgz",
-      "integrity": "sha512-3jatXi9ObIsPGr3N5hGw/vWWcTkq6hUYhpQz4k0wLC+owqWi/LiugIw9x0EdNZ2yGedKN/HzePiBvaJRXa0Ujg==",
+      "version": "5.1.9",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.1.9.tgz",
+      "integrity": "sha512-m8nVez3rwrgmWxtLMt1ZYXB2Lv7OKYn/disyxAlSDYAlKSlFoPPfIAmAM/M5xqL4m4C/wAPw7S2/CNaUii1Hxg==",
       "dev": true,
       "license": "MIT"
     },