diff --git a/src/main/java/com/github/javafaker/IdNumber.java b/src/main/java/com/github/javafaker/IdNumber.java
index d2695aa1..445adf26 100644
--- a/src/main/java/com/github/javafaker/IdNumber.java
+++ b/src/main/java/com/github/javafaker/IdNumber.java
@@ -11,7 +11,7 @@ protected IdNumber(Faker faker) {
     }
 
     public String valid() {
-        return faker.fakeValuesService().resolve("id_number.valid", this, faker);
+        return faker.numerify(faker.fakeValuesService().resolve("id_number.valid", this, faker));
     }
 
     public String invalid() {