diff --git a/package.json b/package.json
index 13f4e2a..e317e28 100644
--- a/package.json
+++ b/package.json
@@ -29,13 +29,13 @@
     "prepare": "concurrently \"tsc\" \"rollup --config\""
   },
   "devDependencies": {
-    "browser-sync": "^2.26.7",
-    "concurrently": "^5.1.0",
-    "rollup": "^2.3.2",
-    "rollup-plugin-terser": "^5.3.0",
+    "browser-sync": "^2.26.14",
+    "concurrently": "^5.3.0",
+    "rollup": "^2.38.4",
+    "rollup-plugin-terser": "^7.0.2",
     "rollup-plugin-typescript": "^1.0.1",
-    "tslib": "^1.11.1",
-    "typescript": "^3.8.3"
+    "tslib": "^2.1.0",
+    "typescript": "^4.1.3"
   },
   "files": [
     "browser/",