diff --git a/package.json b/package.json
index 9cf94f5..3527703 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "mocha": "^4.0.1",
     "npm-run-all": "^4.0.2",
     "power-assert": "^1.4.4",
-    "typescript": "^2.3.2"
+    "typescript": "^2.3.4"
   },
   "homepage": "https://github.com/teppeis/kintone-plugin-manifest-validator#readme",
   "repository": {
diff --git a/yarn.lock b/yarn.lock
index 1916e2f..504c5ab 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1606,9 +1606,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^2.3.2:
-  version "2.6.1"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-2.6.1.tgz#ef39cdea27abac0b500242d6726ab90e0c846631"
+typescript@^2.3.4:
+  version "2.7.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
 
 universal-deep-strict-equal@^1.2.1:
   version "1.2.2"