diff --git a/functions/package.json b/functions/package.json
index 1f552dc..274cd6a 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -31,7 +31,7 @@
     "eslint-config-google": "^0.14.0",
     "eslint-plugin-import": "^2.32.0",
     "firebase-functions-test": "^3.4.1",
-    "typescript": "^5.9.3",
+    "typescript": "^6.0.3",
     "typescript-eslint": "^8.59.0"
   },
   "private": true
diff --git a/functions/yarn.lock b/functions/yarn.lock
index ce3023a..638ec27 100644
--- a/functions/yarn.lock
+++ b/functions/yarn.lock
@@ -3216,10 +3216,10 @@ typescript-eslint@^8.59.0:
     "@typescript-eslint/typescript-estree" "8.59.0"
     "@typescript-eslint/utils" "8.59.0"
 
-typescript@^5.9.3:
-  version "5.9.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
-  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
+typescript@^6.0.3:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-6.0.3.tgz#90251dc007916e972786cb94d74d15b185577d21"
+  integrity sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==
 
 unbox-primitive@^1.1.0:
   version "1.1.0"