diff --git a/lib/utils/config.js b/lib/utils/config.js
--- a/lib/utils/config.js
+++ b/lib/utils/config.js
@@ -24,7 +24,7 @@
 
 let registeredConfig: ?Config = null;
 
-const registerConfig = (config: $Shape<Config>) => {
+const registerConfig = (config: Config) => {
   registeredConfig = { ...registeredConfig, ...config };
 };