diff --git a/package.json b/package.json
index 8a8adda..a240e05 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,6 @@
     "tslint-config-ikatyang": "2.5.1",
     "tslint-config-prettier": "1.18.0",
     "tslint-plugin-prettier": "2.0.1",
-    "typescript": "2.9.2"
+    "typescript": "3.4.2"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 4da03c6..2556bb7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3319,9 +3319,9 @@ type-detect@^4.0.0, type-detect@^4.0.5:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
 
-typescript@2.9.2:
-  version "2.9.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
+typescript@3.4.2:
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.4.2.tgz#9ed4e6475d906f589200193be056f5913caed481"
 
 uglify-js@^3.1.4:
   version "3.4.10"