diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e1b7e03..491bd26 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: eclipse-temurin:17.0.14_7-jdk-alpine
+image: eclipse-temurin:21.0.6_7-jdk-alpine
 
 variables:
   MAVEN_OPTS: >-
diff --git a/Dockerfile b/Dockerfile
index 7301b1e..43cdcaf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM eclipse-temurin:17.0.14_7-jdk-alpine AS build
+FROM eclipse-temurin:21.0.6_7-jdk-alpine AS build
 
 COPY .mvn/ .mvn
 COPY mvnw pom.xml ./
@@ -8,7 +8,7 @@ RUN ["chmod", "+x", "./mvnw"]
 RUN ./mvnw install
 
 
-FROM eclipse-temurin:17.0.14_7-jre-alpine
+FROM eclipse-temurin:21.0.6_7-jre-alpine
 
 RUN apk add netcat-openbsd
 RUN apk add curl
diff --git a/pom.xml b/pom.xml
index 04bb714..f7e3b5b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,10 +13,10 @@
 
     <properties>
         <main.class>me.bobert.netneutrality.NetNeutrality</main.class>
-        <java.version>17</java.version>
+        <java.version>21</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
     </properties>
 
     <build>