diff --git a/.github/workflows/publication.yml b/.github/workflows/publication.yml
index 8fe1b8d..734f826 100644
--- a/.github/workflows/publication.yml
+++ b/.github/workflows/publication.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'adopt'
           cache: 'gradle'
       - name: Deploy artifacts
diff --git a/.sdkmanrc b/.sdkmanrc
index 2d563da..7155110 100644
--- a/.sdkmanrc
+++ b/.sdkmanrc
@@ -1,4 +1,4 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=17.0.9-graal
+java=21.0.1-graal
 gradle=8.5
diff --git a/.version b/.version
index 2f45361..be58634 100644
--- a/.version
+++ b/.version
@@ -1 +1 @@
-0.2
\ No newline at end of file
+0.3
diff --git a/build.gradle b/build.gradle
index cde4259..e317cb9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -46,8 +46,8 @@ subprojects {
     }
 
     java {
-        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
     }
 
     test {