diff --git a/.docker/dokka/Dockerfile b/.docker/dokka/Dockerfile
index 294c71d..83c92de 100644
--- a/.docker/dokka/Dockerfile
+++ b/.docker/dokka/Dockerfile
@@ -1,6 +1,6 @@
 # Builds the aggregated Dokka HTML site (root `./gradlew dokkaGenerate`, see build.gradle.kts,
 # output: build/dokka/html) and serves it as static files.
-FROM eclipse-temurin:21-jdk AS build
+FROM eclipse-temurin:25-jdk AS build
 WORKDIR /app
 
 COPY . .