diff --git a/package.json b/package.json
index 0c4151bd35d..5ef4c3a5db5 100644
--- a/package.json
+++ b/package.json
@@ -109,6 +109,7 @@
     "@types/trusted-types": "^1.0.6",
     "@types/vscode-windows-registry": "^1.0.0",
     "@types/webpack": "^4.41.25",
+    "@types/wicg-file-system-access": "^2020.9.1",
     "@types/windows-foreground-love": "^0.3.0",
     "@types/windows-mutex": "^0.4.0",
     "@types/windows-process-tree": "^0.2.0",
diff --git a/src/tsconfig.json b/src/tsconfig.json
index 2f1c74627b8..e6e78721e86 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -12,7 +12,8 @@
 			"semver",
 			"sinon",
 			"winreg",
-			"trusted-types"
+			"trusted-types",
+			"wicg-file-system-access"
 		],
 		"plugins": [
 			{
diff --git a/yarn.lock b/yarn.lock
index 5135736b25e..af37b508cde 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -570,6 +570,11 @@
     "@types/webpack-sources" "*"
     source-map "^0.6.0"
 
+"@types/wicg-file-system-access@^2020.9.1":
+  version "2020.9.1"
+  resolved "https://registry.yarnpkg.com/@types/wicg-file-system-access/-/wicg-file-system-access-2020.9.1.tgz#ae1f420b0ca70f545c8621a9b63ed29270ef724a"
+  integrity sha512-hEN/YpLwvDjhRJrKoBiyiKtIh2zNkmJ/GY9VWIXNgjy7TBZNM9upfb/rnWDGpOoLomnEQtlTBjFBFCDra1oxOQ==
+
 "@types/windows-foreground-love@^0.3.0":
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/@types/windows-foreground-love/-/windows-foreground-love-0.3.0.tgz#26bc230b2568aa7ab7c56d35bb5653c0a6965a42"