diff --git a/Backend/build.gradle.kts b/Backend/build.gradle.kts
index 3f20aac..a147e2d 100644
--- a/Backend/build.gradle.kts
+++ b/Backend/build.gradle.kts
@@ -24,6 +24,9 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
     runtimeOnly("org.mariadb.jdbc:mariadb-java-client")
     testImplementation("org.springframework.boot:spring-boot-starter-test")
+
+    // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-validation
+    implementation("org.springframework.boot", "spring-boot-starter-validation", "2.4.1")
 }
 
 tasks.withType<KotlinCompile> {