diff --git a/.gitignore b/.gitignore
index 581cf4b..d1c526b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,7 @@ jquery.pubsub.js
 .nyc_output/
 coverage
 # yarn lock file
-yarn.lock
\ No newline at end of file
+yarn.lock
+# ide default config file
+.idea
+.vscode
diff --git a/package-lock.json b/package-lock.json
index 0a88278..cf62799 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -289,6 +289,11 @@
       "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
       "dev": true
     },
+    "@types/pubsub-js": {
+      "version": "1.8.3",
+      "resolved": "https://registry.npmjs.org/@types/pubsub-js/-/pubsub-js-1.8.3.tgz",
+      "integrity": "sha512-6BqY04dh2UV1dNV690tyJVJYQ0U6qBH4tU+FCwY1Mhl8jOPOP9qiIvgLnB59cVik/E6/R002oXZpGiDm+2C8eA=="
+    },
     "acorn": {
       "version": "5.5.3",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
diff --git a/package.json b/package.json
index 7dabb1a..67ede11 100644
--- a/package.json
+++ b/package.json
@@ -41,5 +41,8 @@
     "nyc": "15.0.0",
     "referee": "^1.2.0",
     "sinon": "9.0.0"
+  },
+  "dependencies": {
+    "@types/pubsub-js": "^1.8.3"
   }
 }