diff --git a/package.json b/package.json
index adc6392..ab2f5e2 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "karma-phantomjs-launcher": "0.1.2",
     "karma-qunit": "^0.1.1",
     "merge2": "^0.3.6",
-    "typescript": "~1.5.0",
+    "typescript": "~4.3.5",
     "phantomjs": "^1.9.7-3",
     "qunitjs": "~1.14.0",
     "vinyl-buffer": "^1.0.0",