diff --git a/src/main/kotlin/com/sample/resolver/SampleGraphQLQueryResolver.kt b/src/main/kotlin/com/sample/resolver/SampleGraphQLQueryResolver.kt
index e1cd7b3..908b11f 100644
--- a/src/main/kotlin/com/sample/resolver/SampleGraphQLQueryResolver.kt
+++ b/src/main/kotlin/com/sample/resolver/SampleGraphQLQueryResolver.kt
@@ -6,12 +6,8 @@
 
 @Component
 class SampleGraphQLQueryResolver : GraphQLQueryResolver {
-    fun getBook(name : String) : Book {
-        val b = Book(123, "タイトル", "俺", 1000);
-        return b;
-    }
+    fun getBook(name : String) : Book =
+        Book(id = 123, name = "タイトル", author = "俺", value = 1000);
 
-    fun live() : Boolean {
-        return true;
-    }
-}
\ No newline at end of file
+    fun live() : Boolean = true
+}