diff --git a/package-lock.json b/package-lock.json
index 5c12927..4cd1c6c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,6 +17,7 @@
                 "@vscode/test-cli": "^0.0.12",
                 "@vscode/test-electron": "^2.5.2",
                 "eslint": "^9.39.2",
+                "ts-api-utils": "^2.4.0",
                 "typescript": "^5.9.3"
             },
             "engines": {
diff --git a/package.json b/package.json
index 0cbc2cd..0499aeb 100644
--- a/package.json
+++ b/package.json
@@ -60,6 +60,7 @@
         "@vscode/test-cli": "^0.0.12",
         "@vscode/test-electron": "^2.5.2",
         "eslint": "^9.39.2",
+        "ts-api-utils": "^2.4.0",
         "typescript": "^5.9.3"
     },
     "engines": {