diff --git a/spring-vault-core/src/main/java/org/springframework/vault/client/RestTemplateBuilder.java b/spring-vault-core/src/main/java/org/springframework/vault/client/RestTemplateBuilder.java
index b05a792a..073fce16 100644
--- a/spring-vault-core/src/main/java/org/springframework/vault/client/RestTemplateBuilder.java
+++ b/spring-vault-core/src/main/java/org/springframework/vault/client/RestTemplateBuilder.java
@@ -176,7 +176,7 @@ public class RestTemplateBuilder {
 	 * @param customizer the template customizers to add.
 	 * @return {@code this} {@link RestTemplateBuilder}.
 	 */
-	public RestTemplateBuilder customizer(RestTemplateCustomizer... customizer) {
+	public RestTemplateBuilder customizers(RestTemplateCustomizer... customizer) {
 
 		this.customizers.addAll(Arrays.asList(customizer));
 
diff --git a/spring-vault-core/src/main/java/org/springframework/vault/client/WebClientBuilder.java b/spring-vault-core/src/main/java/org/springframework/vault/client/WebClientBuilder.java
index 4b1ae063..69271758 100644
--- a/spring-vault-core/src/main/java/org/springframework/vault/client/WebClientBuilder.java
+++ b/spring-vault-core/src/main/java/org/springframework/vault/client/WebClientBuilder.java
@@ -150,7 +150,7 @@ public class WebClientBuilder {
 	 * @param customizer the client customizers to add.
 	 * @return {@code this} {@link WebClientBuilder}.
 	 */
-	public WebClientBuilder customizer(WebClientCustomizer... customizer) {
+	public WebClientBuilder customizers(WebClientCustomizer... customizer) {
 
 		this.customizers.addAll(Arrays.asList(customizer));
 
diff --git a/spring-vault-core/src/main/java/org/springframework/vault/core/VaultTemplate.java b/spring-vault-core/src/main/java/org/springframework/vault/core/VaultTemplate.java
index ed49e90c..ada9c229 100644
--- a/spring-vault-core/src/main/java/org/springframework/vault/core/VaultTemplate.java
+++ b/spring-vault-core/src/main/java/org/springframework/vault/core/VaultTemplate.java
@@ -183,7 +183,7 @@ public class VaultTemplate implements InitializingBean, VaultOperations, Disposa
 			ClientHttpRequestFactory requestFactory) {
 
 		return RestTemplateBuilder.builder().endpointProvider(endpointProvider)
-				.requestFactory(requestFactory).customizer(restTemplate -> restTemplate
+				.requestFactory(requestFactory).customizers(restTemplate -> restTemplate
 						.getInterceptors().add(getSessionInterceptor()))
 				.build();
 	}
diff --git a/spring-vault-core/src/test/java/org/springframework/vault/authentication/ClientCertificateNamespaceIntegrationTests.java b/spring-vault-core/src/test/java/org/springframework/vault/authentication/ClientCertificateNamespaceIntegrationTests.java
index e5661174..61db022d 100644
--- a/spring-vault-core/src/test/java/org/springframework/vault/authentication/ClientCertificateNamespaceIntegrationTests.java
+++ b/spring-vault-core/src/test/java/org/springframework/vault/authentication/ClientCertificateNamespaceIntegrationTests.java
@@ -86,7 +86,7 @@ class ClientCertificateNamespaceIntegrationTests extends IntegrationTestSupport
 				.requestFactory(ClientHttpRequestFactoryFactory
 						.create(new ClientOptions(), Settings.createSslConfiguration()))
 				.endpoint(TestRestTemplateFactory.TEST_VAULT_ENDPOINT)
-				.customizer(restTemplate -> restTemplate.getInterceptors()
+				.customizers(restTemplate -> restTemplate.getInterceptors()
 						.add(VaultClients.createNamespaceInterceptor("dev")));
 
 		VaultTemplate dev = new VaultTemplate(devRestTemplate,
diff --git a/spring-vault-core/src/test/java/org/springframework/vault/client/RestTemplateBuilderUnitTests.java b/spring-vault-core/src/test/java/org/springframework/vault/client/RestTemplateBuilderUnitTests.java
index 043ed136..6229dd56 100644
--- a/spring-vault-core/src/test/java/org/springframework/vault/client/RestTemplateBuilderUnitTests.java
+++ b/spring-vault-core/src/test/java/org/springframework/vault/client/RestTemplateBuilderUnitTests.java
@@ -55,7 +55,7 @@ class RestTemplateBuilderUnitTests {
 
 		RestTemplate restTemplate = RestTemplateBuilder.builder()
 				.endpoint(VaultEndpoint.create("localhost", 8200))
-				.customizer(it -> it.setErrorHandler(errorHandler)).build();
+				.customizers(it -> it.setErrorHandler(errorHandler)).build();
 
 		assertThat(restTemplate.getErrorHandler()).isSameAs(errorHandler);
 	}
diff --git a/spring-vault-core/src/test/java/org/springframework/vault/core/VaultNamespaceSecretIntegrationTests.java b/spring-vault-core/src/test/java/org/springframework/vault/core/VaultNamespaceSecretIntegrationTests.java
index 0e381a2c..1780b6d4 100644
--- a/spring-vault-core/src/test/java/org/springframework/vault/core/VaultNamespaceSecretIntegrationTests.java
+++ b/spring-vault-core/src/test/java/org/springframework/vault/core/VaultNamespaceSecretIntegrationTests.java
@@ -91,7 +91,7 @@ class VaultNamespaceSecretIntegrationTests extends IntegrationTestSupport {
 				.requestFactory(ClientHttpRequestFactoryFactory
 						.create(new ClientOptions(), Settings.createSslConfiguration()))
 				.endpoint(TestRestTemplateFactory.TEST_VAULT_ENDPOINT)
-				.customizer(restTemplate -> restTemplate.getInterceptors()
+				.customizers(restTemplate -> restTemplate.getInterceptors()
 						.add(VaultClients.createNamespaceInterceptor("dev")));
 
 		maketingRestTemplate = RestTemplateBuilder.builder()