diff --git a/binary-nbt/package.json b/binary-nbt/package.json
index 9f114af..e32c4b8 100644
--- a/binary-nbt/package.json
+++ b/binary-nbt/package.json
@@ -44,7 +44,7 @@
         "ts-mocha": "6.0.0",
         "tslint": "5.17.0",
         "typedoc": "0.14.2",
-        "typescript": "3.4.5"
+        "typescript": "4.3.4"
     },
     "homepage": "https://github.com/Levertion/mcfunction#readme",
     "files": [
diff --git a/id/package.json b/id/package.json
index 82ac98e..79f0113 100644
--- a/id/package.json
+++ b/id/package.json
@@ -31,7 +31,7 @@
         "ts-mocha": "6.0.0",
         "tslint": "5.17.0",
         "typedoc": "0.14.2",
-        "typescript": "3.4.5"
+        "typescript": "4.3.4"
     },
     "dependencies": {
         "tslib": "1.9.3"
diff --git a/result/package.json b/result/package.json
index 41a07fb..1e7dd17 100644
--- a/result/package.json
+++ b/result/package.json
@@ -31,7 +31,7 @@
         "ts-mocha": "6.0.0",
         "tslint": "5.17.0",
         "typedoc": "0.14.2",
-        "typescript": "3.4.5"
+        "typescript": "4.3.4"
     },
     "dependencies": {
         "tslib": "1.9.3"