diff --git a/package.json b/package.json
index 4609e6d..cb7a099 100644
--- a/package.json
+++ b/package.json
@@ -52,6 +52,6 @@
     "sinon": "6.3.4",
     "tslint": "5.11.0",
     "typedoc": "0.12.0",
-    "typescript": "3.0.3"
+    "typescript": "3.1.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 6b60f5b..c86ea5c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4693,14 +4693,14 @@ typedoc@0.12.0:
     typedoc-default-themes "^0.5.0"
     typescript "3.0.x"
 
-typescript@3.0.3:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.3.tgz#4853b3e275ecdaa27f78fda46dc273a7eb7fc1c8"
-
 typescript@3.0.x:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.1.tgz#43738f29585d3a87575520a4b93ab6026ef11fdb"
 
+typescript@3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.1.tgz#3362ba9dd1e482ebb2355b02dfe8bcd19a2c7c96"
+
 uglify-js@^2.6:
   version "2.8.28"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.28.tgz#e335032df9bb20dcb918f164589d5af47f38834a"