diff --git a/build.gradle b/build.gradle
index 8c33cb8..c4d3a63 100644
--- a/build.gradle
+++ b/build.gradle
@@ -72,7 +72,7 @@ dependencies {
     testImplementation 'org.springframework.security:spring-security-test'
     testImplementation 'org.springframework.retry:spring-retry:2.0.12'
     testImplementation 'jakarta.validation:jakarta.validation-api:3.1.1'
-    testImplementation 'org.hibernate.validator:hibernate-validator:8.0.2.Final'
+    testImplementation 'org.hibernate.validator:hibernate-validator:9.1.0.Final'
     testImplementation 'com.h2database:h2:2.4.240'
 
     // Spring Boot 4 test starters (modular test infrastructure)
@@ -86,12 +86,12 @@ dependencies {
     testRuntimeOnly 'org.postgresql:postgresql'
 
     // Additional test dependencies for improved testing
-    testImplementation 'org.testcontainers:testcontainers:1.21.3'
-    testImplementation 'org.testcontainers:mariadb:1.21.3'
+    testImplementation 'org.testcontainers:testcontainers:2.0.2'
+    testImplementation 'org.testcontainers:testcontainers-mariadb:2.0.2'
     testImplementation 'com.github.tomakehurst:wiremock:3.0.1'
     testImplementation 'com.tngtech.archunit:archunit-junit5:1.4.1'
     testImplementation 'org.assertj:assertj-core:3.27.6'
-    testImplementation 'io.rest-assured:rest-assured:5.5.6'
+    testImplementation 'io.rest-assured:rest-assured:6.0.0'
     testImplementation 'com.icegreen:greenmail:2.1.8'
     testImplementation 'org.awaitility:awaitility:4.3.0'
 }