diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a7a9b882b..08764879a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,11 +12,11 @@ jobs:
 
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@5ffc13f4174014e2d4d4572b3d74c3fa61aeb2c2 # v3.11.0
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 21
           cache: 'maven'
         env:
           # work around an issue with actions/runner setting an incorrect HOME in containers, which breaks maven caching
diff --git a/pom.xml b/pom.xml
index 70e5e4804..1ce88bf67 100644
--- a/pom.xml
+++ b/pom.xml
@@ -74,8 +74,8 @@
     <swagger.version>2.2.17</swagger.version>
     <vavr.version>0.10.4</vavr.version>
 
-    <!-- 17.0.8_7-jre-jammy -->
-    <docker.image.sha256>b8af44d6a7e0615a7486d7307dd54bba23ff24e3aea14893fd2795e8c436d44e</docker.image.sha256>
+    <!-- 21.0.1_12-jre-jammy -->
+    <docker.image.sha256>2d00f6910282a7a20ae7747b8f5e2371f7d55f06daed6bf60a323fcc7eaa3da8</docker.image.sha256>
 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
@@ -433,7 +433,7 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.11.0</version>
         <configuration>
-          <release>17</release>
+          <release>21</release>
         </configuration>
       </plugin>