diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2279737c40..10143e9508 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Java JDK
         uses: actions/setup-java@v1.4.3
         with:
-          java-version: 17
+          java-version: 21
 
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
diff --git a/build.gradle.kts b/build.gradle.kts
index 956441373b..66544fa414 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -26,14 +26,8 @@ allprojects {
     }
 }
 
-java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
-}
-
 subprojects {
     tasks.withType<KotlinCompile> {
-        kotlinOptions.jvmTarget = Versions.JVM_TARGET
         kotlinOptions.javaParameters = true
     }
 }
diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index 5700c4c01d..77ba76e5a0 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -8,7 +8,7 @@ object Versions {
     const val KOTLIN_COROUTINES = "1.6.0"
     const val KOTLIN_LOGGING = "2.1.16"
 
-    const val JVM_TARGET = "17"
+    const val JVM_TARGET = "21"
     const val KOTLINX_DATE_TIME = "0.3.3"
     const val PROMETHEUS = "0.12.0"
 }
\ No newline at end of file
diff --git a/loritta-bot-discord/build.gradle.kts b/loritta-bot-discord/build.gradle.kts
index bce768b690..149b148c9e 100644
--- a/loritta-bot-discord/build.gradle.kts
+++ b/loritta-bot-discord/build.gradle.kts
@@ -1,9 +1,3 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = Versions.JVM_TARGET
-}
-
 plugins {
     java
     kotlin("jvm")
@@ -211,7 +205,8 @@ jib {
     }
 }
 
-java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+kotlin {
+    jvmToolchain {
+        languageVersion.set(JavaLanguageVersion.of(Versions.JVM_TARGET))
+    }
 }
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 633cbd30c8..5b12a41588 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -50,6 +50,10 @@ dependencyResolutionManagement {
     }
 }
 
+plugins {
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.7.0"
+}
+
 rootProject.name = "loritta-parent"
 
 // ===[ PUDDING ]===
diff --git a/switch-twitch/build.gradle.kts b/switch-twitch/build.gradle.kts
index 11a16f1e50..a67aa1a947 100644
--- a/switch-twitch/build.gradle.kts
+++ b/switch-twitch/build.gradle.kts
@@ -1,5 +1,3 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
 plugins {
     java
     kotlin("jvm")
@@ -16,8 +14,10 @@ dependencies {
     implementation(libs.kotlinx.serialization.json)
 }
 
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = Versions.JVM_TARGET
+kotlin {
+    jvmToolchain {
+        languageVersion.set(JavaLanguageVersion.of(Versions.JVM_TARGET))
+    }
 }
 
 tasks.test {
diff --git a/temmie-discord-auth-loritta-commons/build.gradle.kts b/temmie-discord-auth-loritta-commons/build.gradle.kts
index 5a93b7977e..be673f4fae 100644
--- a/temmie-discord-auth-loritta-commons/build.gradle.kts
+++ b/temmie-discord-auth-loritta-commons/build.gradle.kts
@@ -8,4 +8,10 @@ dependencies {
     implementation(libs.kotlinx.serialization.json)
     implementation(libs.ktor.server.core)
     implementation(libs.ktor.server.sessions)
+}
+
+kotlin {
+    jvmToolchain {
+        languageVersion.set(JavaLanguageVersion.of(Versions.JVM_TARGET))
+    }
 }
\ No newline at end of file
diff --git a/temmie-discord-auth/build.gradle.kts b/temmie-discord-auth/build.gradle.kts
index 3f5fb35e2b..30d721f51f 100644
--- a/temmie-discord-auth/build.gradle.kts
+++ b/temmie-discord-auth/build.gradle.kts
@@ -27,6 +27,12 @@ dependencies {
 	testImplementation("org.assertj:assertj-core:3.12.2")
 }
 
+kotlin {
+	jvmToolchain {
+		languageVersion.set(JavaLanguageVersion.of(Versions.JVM_TARGET))
+	}
+}
+
 tasks.test {
 	useJUnitPlatform()
 }