diff --git a/3-Domain/src/main/java/category/CategoryName.java b/3-Domain/src/main/java/category/CategoryName.java
index 48857c6..f7c6b0d 100644
--- a/3-Domain/src/main/java/category/CategoryName.java
+++ b/3-Domain/src/main/java/category/CategoryName.java
@@ -12,12 +12,12 @@ public class CategoryName {
 		return name;
 	}
 
-	public CategoryName(final String name) throws IllegalValueObjectArgument {
+	public CategoryName(final String name) {
 		validateName(name);
 		this.name = name;
 	}
 
-	private void validateName(final String name) throws IllegalValueObjectArgument {
+	private void validateName(final String name) {
 		if (name == null) {
 			throw new IllegalValueObjectArgument("A Category name can not be null.");
 		}
diff --git a/3-Domain/src/main/java/exeptions/IllegalValueObjectArgument.java b/3-Domain/src/main/java/exeptions/IllegalValueObjectArgument.java
index e5e7ded..8fc855b 100644
--- a/3-Domain/src/main/java/exeptions/IllegalValueObjectArgument.java
+++ b/3-Domain/src/main/java/exeptions/IllegalValueObjectArgument.java
@@ -1,6 +1,6 @@
 package exeptions;
 
-public class IllegalValueObjectArgument extends Exception {
+public class IllegalValueObjectArgument extends RuntimeException {
 
 	public IllegalValueObjectArgument(String message) {
 		super(message);
diff --git a/3-Domain/src/main/java/link/LinkUrl.java b/3-Domain/src/main/java/link/LinkUrl.java
index 0d191e9..9aa7a5c 100644
--- a/3-Domain/src/main/java/link/LinkUrl.java
+++ b/3-Domain/src/main/java/link/LinkUrl.java
@@ -9,7 +9,7 @@ public class LinkUrl {
 
 	private final URL url;
 
-	public LinkUrl(String urlString) throws IllegalValueObjectArgument {
+	public LinkUrl(String urlString) {
 		try {
 			this.url = new URL(urlString);
 		}