diff --git a/src/package-linker.js b/src/package-linker.js
index 7680f5cfd4..66308d2221 100644
--- a/src/package-linker.js
+++ b/src/package-linker.js
@@ -624,7 +624,7 @@ export default class PackageLinker {
         const range = peerDeps[peerDepName];
         const meta = peerDepsMeta && peerDepsMeta[peerDepName];
 
-        const isOptional = meta && meta.optional ? true : false;
+        const isOptional = !!(meta && meta.optional);
 
         const peerPkgs = this.resolver.getAllInfoForPackageName(peerDepName);
 
diff --git a/src/types.js b/src/types.js
index d68bb262e7..934c3defda 100644
--- a/src/types.js
+++ b/src/types.js
@@ -13,8 +13,7 @@ export type CLIFunction = (config: Config, reporter: Reporter, flags: Object, ar
 type _CLIFunctionReturn = boolean;
 export type CLIFunctionReturn = ?_CLIFunctionReturn | Promise<?_CLIFunctionReturn>;
 
-export type DependencyMeta = {
-};
+export type DependencyMeta = {};
 
 export type DependenciesMeta = {
   [name: string]: DependencyMeta,