diff --git a/js/fileUtils.ts b/js/fileUtils.ts
index d8caceff..b63fd32f 100644
--- a/js/fileUtils.ts
+++ b/js/fileUtils.ts
@@ -84,6 +84,7 @@ export async function promptForFileReferences(
     if (accept) fileInput.setAttribute("accept", accept);
     fileInput.type = "file";
     fileInput.multiple = true;
+    // @ts-ignore Non-standard
     fileInput.webkitdirectory = directory;
     // @ts-ignore Non-standard
     fileInput.directory = directory;
diff --git a/package.json b/package.json
index 74179012..83c54a66 100644
--- a/package.json
+++ b/package.json
@@ -119,7 +119,7 @@
     "style-loader": "^0.23.1",
     "tinyqueue": "^1.2.3",
     "travis-weigh-in": "^1.0.2",
-    "typescript": "^3.0.1",
+    "typescript": "^3.2.2",
     "uglifyjs-webpack-plugin": "^1.2.5",
     "unminified-webpack-plugin": "^2.0.0",
     "url-loader": "^1.1.2",
diff --git a/yarn.lock b/yarn.lock
index f3cd46b3..14784973 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8549,9 +8549,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.1.tgz#43738f29585d3a87575520a4b93ab6026ef11fdb"
+typescript@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.2.tgz#fe8101c46aa123f8353523ebdcf5730c2ae493e5"
 
 ua-parser-js@^0.7.9:
   version "0.7.17"