diff --git a/lib/types/keyserver-types.js b/lib/types/keyserver-types.js
--- a/lib/types/keyserver-types.js
+++ b/lib/types/keyserver-types.js
@@ -16,8 +16,10 @@
   +lastCommunicatedPlatformDetails: ?PlatformDetails,
 };
 
+export type KeyserverInfos = { +[key: string]: KeyserverInfo };
+
 export type KeyserverStore = {
-  +keyserverInfos: { +[key: string]: KeyserverInfo },
+  +keyserverInfos: KeyserverInfos,
 };
 
 export type AddKeyserverPayload = {