diff --git a/package.json b/package.json
index 06ba8c5c..098af678 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "jest": "28.1.3",
     "prettier": "3.3.3",
     "ts-node": "10.9.2",
-    "typescript": "4.7.4"
+    "typescript": "4.9.5"
   },
   "packageManager": "yarn@3.8.6",
   "dependencies": {
diff --git a/src/2020/Day-11-Seating-System/package.json b/src/2020/Day-11-Seating-System/package.json
index 11b2cb84..4488706c 100644
--- a/src/2020/Day-11-Seating-System/package.json
+++ b/src/2020/Day-11-Seating-System/package.json
@@ -10,6 +10,6 @@
   "license": "MIT",
   "devDependencies": {
     "parcel": "2.12.0",
-    "typescript": "4.7.4"
+    "typescript": "4.9.5"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index bd4861d7..946016c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2942,7 +2942,7 @@ __metadata:
     jest: 28.1.3
     prettier: 3.3.3
     ts-node: 10.9.2
-    typescript: 4.7.4
+    typescript: 4.9.5
   languageName: unknown
   linkType: soft
 
@@ -6708,23 +6708,23 @@ __metadata:
   languageName: node
   linkType: hard
 
-"typescript@npm:4.7.4":
-  version: 4.7.4
-  resolution: "typescript@npm:4.7.4"
+"typescript@npm:4.9.5":
+  version: 4.9.5
+  resolution: "typescript@npm:4.9.5"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 5750181b1cd7e6482c4195825547e70f944114fb47e58e4aa7553e62f11b3f3173766aef9c281783edfd881f7b8299cf35e3ca8caebe73d8464528c907a164df
+  checksum: ee000bc26848147ad423b581bd250075662a354d84f0e06eb76d3b892328d8d4440b7487b5a83e851b12b255f55d71835b008a66cbf8f255a11e4400159237db
   languageName: node
   linkType: hard
 
-"typescript@patch:typescript@4.7.4#~builtin<compat/typescript>":
-  version: 4.7.4
-  resolution: "typescript@patch:typescript@npm%3A4.7.4#~builtin<compat/typescript>::version=4.7.4&hash=65a307"
+"typescript@patch:typescript@4.9.5#~builtin<compat/typescript>":
+  version: 4.9.5
+  resolution: "typescript@patch:typescript@npm%3A4.9.5#~builtin<compat/typescript>::version=4.9.5&hash=289587"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 9096d8f6c16cb80ef3bf96fcbbd055bf1c4a43bd14f3b7be45a9fbe7ada46ec977f604d5feed3263b4f2aa7d4c7477ce5f9cd87de0d6feedec69a983f3a4f93e
+  checksum: 1f8f3b6aaea19f0f67cba79057674ba580438a7db55057eb89cc06950483c5d632115c14077f6663ea76fd09fce3c190e6414bb98582ec80aa5a4eaf345d5b68
   languageName: node
   linkType: hard