diff --git a/keyserver/src/responders/website-responders.js b/keyserver/src/responders/website-responders.js
--- a/keyserver/src/responders/website-responders.js
+++ b/keyserver/src/responders/website-responders.js
@@ -24,7 +24,6 @@
 import { defaultEnabledReports } from 'lib/types/report-types';
 import { defaultConnectionInfo } from 'lib/types/socket-types';
 import { threadPermissions, threadTypes } from 'lib/types/thread-types';
-import type { CurrentUserInfo } from 'lib/types/user-types';
 import { currentDateInTimeZone } from 'lib/utils/date-utils';
 import { ServerError } from 'lib/utils/errors';
 import { promiseAll } from 'lib/utils/promises';
@@ -312,7 +311,7 @@
   const initialReduxState = await promiseAll({
     navInfo: navInfoPromise,
     deviceID: null,
-    currentUserInfo: ((currentUserInfoPromise: any): Promise<CurrentUserInfo>),
+    currentUserInfo: currentUserInfoPromise,
     draftStore: { drafts: {} },
     sessionID: sessionIDPromise,
     entryStore: entryStorePromise,
diff --git a/keyserver/src/utils/json-stream.js b/keyserver/src/utils/json-stream.js
--- a/keyserver/src/utils/json-stream.js
+++ b/keyserver/src/utils/json-stream.js
@@ -5,8 +5,7 @@
 import replaceStream from 'replacestream';
 import Combine from 'stream-combiner';
 
-type Promisable<T> = Promise<T> | T;
-function streamJSON<T: { [key: string]: Promisable<*> }>(
+function streamJSON<T: { +[key: string]: mixed }>(
   res: $Response,
   input: T,
 ): stream$Readable {
@@ -19,7 +18,7 @@
   return jsonStream;
 }
 
-function resolvePromisesToStream<T: { [key: string]: Promisable<*> }>(
+function resolvePromisesToStream<T: { +[key: string]: mixed }>(
   stream: { +write: ([string, mixed]) => mixed, +end: () => mixed, ... },
   input: T,
 ) {