diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 1455497b..feaf20d6 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: '11'
+          java-version: '17'
           cache: 'gradle'
       - name: Build
         run: ./gradlew check
diff --git a/README.md b/README.md
index 44229a58..deee04bf 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A Java module which standardises the logging for the reform projects.
 
 ## Prerequisites
 
-- [Java 11](https://adoptium.net/)
+- [Java 17](https://adoptium.net/)
 
 ## User guide
 
diff --git a/build.gradle b/build.gradle
index 4968cbe6..89008ebd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,7 +38,7 @@ allprojects {
 
   java {
     toolchain {
-      languageVersion = JavaLanguageVersion.of(11)
+      languageVersion = JavaLanguageVersion.of(17)
     }
   }