diff --git a/src/main/java/org/springframework/samples/petclinic/model/Person.java b/src/main/java/org/springframework/samples/petclinic/model/Person.java
index e41b6ba90..7c3d81a84 100644
--- a/src/main/java/org/springframework/samples/petclinic/model/Person.java
+++ b/src/main/java/org/springframework/samples/petclinic/model/Person.java
@@ -17,7 +17,7 @@ package org.springframework.samples.petclinic.model;
 
 import jakarta.persistence.Column;
 import jakarta.persistence.MappedSuperclass;
-import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotBlank;
 
 /**
  * Simple JavaBean domain object representing an person.
@@ -28,11 +28,11 @@ import jakarta.validation.constraints.NotEmpty;
 public class Person extends BaseEntity {
 
 	@Column(name = "first_name")
-	@NotEmpty
+	@NotBlank
 	private String firstName;
 
 	@Column(name = "last_name")
-	@NotEmpty
+	@NotBlank
 	private String lastName;
 
 	public String getFirstName() {
diff --git a/src/main/java/org/springframework/samples/petclinic/owner/Owner.java b/src/main/java/org/springframework/samples/petclinic/owner/Owner.java
index 78599d087..c7394689a 100644
--- a/src/main/java/org/springframework/samples/petclinic/owner/Owner.java
+++ b/src/main/java/org/springframework/samples/petclinic/owner/Owner.java
@@ -31,7 +31,7 @@ import jakarta.persistence.OneToMany;
 import jakarta.persistence.OrderBy;
 import jakarta.persistence.Table;
 import jakarta.validation.constraints.Digits;
-import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotBlank;
 
 /**
  * Simple JavaBean domain object representing an owner.
@@ -47,15 +47,15 @@ import jakarta.validation.constraints.NotEmpty;
 public class Owner extends Person {
 
 	@Column(name = "address")
-	@NotEmpty
+	@NotBlank
 	private String address;
 
 	@Column(name = "city")
-	@NotEmpty
+	@NotBlank
 	private String city;
 
 	@Column(name = "telephone")
-	@NotEmpty
+	@NotBlank
 	@Digits(fraction = 0, integer = 10)
 	private String telephone;
 
diff --git a/src/main/java/org/springframework/samples/petclinic/owner/PetController.java b/src/main/java/org/springframework/samples/petclinic/owner/PetController.java
index 0c0058f3a..fae63b8fb 100644
--- a/src/main/java/org/springframework/samples/petclinic/owner/PetController.java
+++ b/src/main/java/org/springframework/samples/petclinic/owner/PetController.java
@@ -95,7 +95,7 @@ class PetController {
 
 	@PostMapping("/pets/new")
 	public String processCreationForm(Owner owner, @Valid Pet pet, BindingResult result, ModelMap model) {
-		if (StringUtils.hasLength(pet.getName()) && pet.isNew() && owner.getPet(pet.getName(), true) != null) {
+		if (StringUtils.hasText(pet.getName()) && pet.isNew() && owner.getPet(pet.getName(), true) != null) {
 			result.rejectValue("name", "duplicate", "already exists");
 		}
 
@@ -127,7 +127,7 @@ class PetController {
 		String petName = pet.getName();
 
 		// checking if the pet name already exist for the owner
-		if (StringUtils.hasLength(petName)) {
+		if (StringUtils.hasText(petName)) {
 			Pet existingPet = owner.getPet(petName.toLowerCase(), false);
 			if (existingPet != null && existingPet.getId() != pet.getId()) {
 				result.rejectValue("name", "duplicate", "already exists");
diff --git a/src/main/java/org/springframework/samples/petclinic/owner/PetValidator.java b/src/main/java/org/springframework/samples/petclinic/owner/PetValidator.java
index e1370b428..6422aa8db 100644
--- a/src/main/java/org/springframework/samples/petclinic/owner/PetValidator.java
+++ b/src/main/java/org/springframework/samples/petclinic/owner/PetValidator.java
@@ -38,7 +38,7 @@ public class PetValidator implements Validator {
 		Pet pet = (Pet) obj;
 		String name = pet.getName();
 		// name validation
-		if (!StringUtils.hasLength(name)) {
+		if (!StringUtils.hasText(name)) {
 			errors.rejectValue("name", REQUIRED, REQUIRED);
 		}
 
diff --git a/src/main/java/org/springframework/samples/petclinic/owner/Visit.java b/src/main/java/org/springframework/samples/petclinic/owner/Visit.java
index d052a4e8d..35569bdaa 100755
--- a/src/main/java/org/springframework/samples/petclinic/owner/Visit.java
+++ b/src/main/java/org/springframework/samples/petclinic/owner/Visit.java
@@ -23,7 +23,7 @@ import org.springframework.samples.petclinic.model.BaseEntity;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Table;
-import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotBlank;
 
 /**
  * Simple JavaBean domain object representing a visit.
@@ -39,7 +39,7 @@ public class Visit extends BaseEntity {
 	@DateTimeFormat(pattern = "yyyy-MM-dd")
 	private LocalDate date;
 
-	@NotEmpty
+	@NotBlank
 	private String description;
 
 	/**
diff --git a/src/test/java/org/springframework/samples/petclinic/model/ValidatorTests.java b/src/test/java/org/springframework/samples/petclinic/model/ValidatorTests.java
index 683db21f6..9fcd5987a 100644
--- a/src/test/java/org/springframework/samples/petclinic/model/ValidatorTests.java
+++ b/src/test/java/org/springframework/samples/petclinic/model/ValidatorTests.java
@@ -54,7 +54,7 @@ class ValidatorTests {
 		assertThat(constraintViolations).hasSize(1);
 		ConstraintViolation<Person> violation = constraintViolations.iterator().next();
 		assertThat(violation.getPropertyPath().toString()).isEqualTo("firstName");
-		assertThat(violation.getMessage()).isEqualTo("must not be empty");
+		assertThat(violation.getMessage()).isEqualTo("must not be blank");
 	}
 
 }