diff --git a/build/package.json b/build/package.json
index 7e096ee9bab0720fbb35faa56d04839f09dbe625..64c0f9277b018cb2963b148341002192bd58b132 100644
--- a/build/package.json
+++ b/build/package.json
@@ -38,7 +38,7 @@
     "minimist": "^1.2.0",
     "request": "^2.85.0",
     "tslint": "^5.9.1",
-    "typescript": "3.1.4",
+    "typescript": "3.2.2",
     "vsce": "1.48.0",
     "xml2js": "^0.4.17"
   },
diff --git a/build/yarn.lock b/build/yarn.lock
index 45a096572239740ce065075326b5302a3e5e0df7..4d2a53c8ee7ef0f4393220a2c33cb893728c48ab 100644
--- a/build/yarn.lock
+++ b/build/yarn.lock
@@ -1894,10 +1894,10 @@ typed-rest-client@^0.9.0:
     tunnel "0.0.4"
     underscore "1.8.3"
 
-typescript@3.1.4:
-  version "3.1.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.4.tgz#c74ef7b3c2da65beff548b903022cb8c3cd997ed"
-  integrity sha512-JZHJtA6ZL15+Q3Dqkbh8iCUmvxD3iJ7ujXS+fVkKnwIVAdHc5BJTDNM0aTrnr2luKulFjU7W+SRhDZvi66Ru7Q==
+typescript@3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.2.tgz#fe8101c46aa123f8353523ebdcf5730c2ae493e5"
+  integrity sha512-VCj5UiSyHBjwfYacmDuc/NOk4QQixbE+Wn7MFJuS0nRuPQbof132Pw4u53dm264O8LPc2MVsc7RJNml5szurkg==
 
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.5"
diff --git a/extensions/typescript-language-features/src/utils/arrays.ts b/extensions/typescript-language-features/src/utils/arrays.ts
index e8aa98a7582c218e22679070b0ff2968dbf126da..bf403c3afeb77a6e5e1aea7e9b843dd7b3b0f47c 100644
--- a/extensions/typescript-language-features/src/utils/arrays.ts
+++ b/extensions/typescript-language-features/src/utils/arrays.ts
@@ -16,6 +16,6 @@ export function equals<T>(one: ReadonlyArray<T>, other: ReadonlyArray<T>, itemEq
 	return true;
 }
 
-export function flatten<T>(arr: ReadonlyArray<ReadonlyArray<T>>): T[] {
+export function flatten<T>(arr: ReadonlyArray<T>[]): T[] {
 	return ([] as T[]).concat.apply([], arr);
 }
\ No newline at end of file
diff --git a/package.json b/package.json
index c4b850d634228e18022faa549209f352b8c477d3..8fbbfd3e7b198b172740ea0da37dc506f020f492 100644
--- a/package.json
+++ b/package.json
@@ -125,7 +125,7 @@
     "source-map": "^0.4.4",
     "ts-loader": "^4.4.2",
     "tslint": "^5.11.0",
-    "typescript": "3.1.4",
+    "typescript": "3.2.2",
     "typescript-formatter": "7.1.0",
     "typescript-tslint-plugin": "^0.0.7",
     "uglify-es": "^3.0.18",
diff --git a/yarn.lock b/yarn.lock
index e8682b9320ce64ec0061fad0b720a0bd0a41f69e..231e608ea25fdc359ef274e0bdc1f53b348c3fb4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8823,10 +8823,10 @@ typescript-tslint-plugin@^0.0.7:
     minimatch "^3.0.4"
     vscode-languageserver "^5.1.0"
 
-typescript@3.1.4:
-  version "3.1.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.4.tgz#c74ef7b3c2da65beff548b903022cb8c3cd997ed"
-  integrity sha512-JZHJtA6ZL15+Q3Dqkbh8iCUmvxD3iJ7ujXS+fVkKnwIVAdHc5BJTDNM0aTrnr2luKulFjU7W+SRhDZvi66Ru7Q==
+typescript@3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.2.tgz#fe8101c46aa123f8353523ebdcf5730c2ae493e5"
+  integrity sha512-VCj5UiSyHBjwfYacmDuc/NOk4QQixbE+Wn7MFJuS0nRuPQbof132Pw4u53dm264O8LPc2MVsc7RJNml5szurkg==
 
 typescript@^2.6.2:
   version "2.6.2"