diff --git a/course-04/exercises/lesson-6/client/package.json b/course-04/exercises/lesson-6/client/package.json
index 1413be10f2..6cc143bd4d 100644
--- a/course-04/exercises/lesson-6/client/package.json
+++ b/course-04/exercises/lesson-6/client/package.json
@@ -15,7 +15,7 @@
     "semantic-ui-css": "^2.4.1",
     "semantic-ui-react": "^0.86.0",
     "styled-components": "^4.3.2",
-    "typescript": "3.4.3"
+    "typescript": "3.9.10"
   },
   "devDependencies": {
     "@types/styled-components": "^4.1.18",