diff --git a/src/main/java/cat/udl/eps/softarch/demo/domain/Adoption.java b/src/main/java/cat/udl/eps/softarch/demo/domain/Adoption.java
index ea011d1c..835d08f8 100644
--- a/src/main/java/cat/udl/eps/softarch/demo/domain/Adoption.java
+++ b/src/main/java/cat/udl/eps/softarch/demo/domain/Adoption.java
@@ -2,6 +2,7 @@
 
 import jakarta.persistence.*;
 import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 
@@ -19,7 +20,7 @@ public class Adoption extends UriEntity<Long> {
     @NotBlank
     private String type;
     
-    @NotBlank
+    @NotNull
     private Boolean confirmed;
     
     @NotBlank