diff --git a/build.gradle b/build.gradle
index 7aef6d9..d511b2e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
@@ -22,7 +22,7 @@
 dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-jersey'
     implementation 'org.springframework.boot:spring-boot-starter-webmvc'
-    providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat-runtime'
+    providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
     testImplementation 'org.springframework.boot:spring-boot-starter-jersey-test'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }