diff --git a/Dockerfile b/Dockerfile
index c2b3f2c..03d3325 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM gradle:8.14.2-jdk17 AS build
+FROM gradle:8.14.2-jdk21 AS build
 
 WORKDIR /app
 
@@ -6,7 +6,7 @@ COPY . .
 
 RUN gradle --no-daemon clean build -x test
 
-FROM eclipse-temurin:17-jre
+FROM eclipse-temurin:21-jre
 
 WORKDIR /app
 
diff --git a/referral/build.gradle.kts b/referral/build.gradle.kts
index c023bdc..c0cc540 100644
--- a/referral/build.gradle.kts
+++ b/referral/build.gradle.kts
@@ -22,5 +22,5 @@ tasks.test {
     useJUnitPlatform()
 }
 kotlin {
-    jvmToolchain(17)
+    jvmToolchain(21)
 }
\ No newline at end of file