chore: fix typescript version (#14746)

diff --git a/package.json b/package.json
index c5fcbe4..988df4d 100644
--- a/package.json
+++ b/package.json
@@ -106,6 +106,6 @@
     "socket.io": "2.2.0",
     "terser": "^5.3.8",
     "ts-jest": "^26.4.3",
-    "typescript": "^4.1.2"
+    "typescript": "4.1.2"
   }
 }