diff --git a/Dockerfile b/Dockerfile
index c8e1478a..1e0d8f56 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM eclipse-temurin:17.0.13_11-jre-focal
+FROM eclipse-temurin:21.0.11_10-jre-noble
 
 ARG jar
 
diff --git a/build.gradle b/build.gradle
index 79590f3d..d0f1b9bc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -35,10 +35,10 @@ allprojects {
     }
     java {
         toolchain {
-            languageVersion.set(JavaLanguageVersion.of(17))
+            languageVersion.set(JavaLanguageVersion.of(21))
         }
-        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
     }
 
     tasks.withType(JavaCompile).configureEach {
diff --git a/iexec-core-library/build.gradle b/iexec-core-library/build.gradle
index 53088907..c24706bb 100644
--- a/iexec-core-library/build.gradle
+++ b/iexec-core-library/build.gradle
@@ -13,8 +13,8 @@ dependencies {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
     withJavadocJar()
     withSourcesJar()
 }
diff --git a/iexec-task-api/build.gradle b/iexec-task-api/build.gradle
index 2d302cde..95e68fe5 100644
--- a/iexec-task-api/build.gradle
+++ b/iexec-task-api/build.gradle
@@ -13,8 +13,8 @@ dependencies {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
     withJavadocJar()
     withSourcesJar()
 }