diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 509d1517..a5aee154 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,8 +37,8 @@ jobs:
     name: Build and Test
     runs-on: ubuntu-latest
     env:
-      RIOT_BRANCH: '2025.04-branch'
-      VERSION_TAG: '2025.07'
+      RIOT_BRANCH: '2025.07-branch'
+      VERSION_TAG: '2025.10'
       DOCKER_REGISTRY: "${{ secrets.DOCKER_REGISTRY || 'local' }}"
 
     steps:
diff --git a/murdock-worker/Dockerfile b/murdock-worker/Dockerfile
index 3620b79d..02ef6aaf 100644
--- a/murdock-worker/Dockerfile
+++ b/murdock-worker/Dockerfile
@@ -44,6 +44,9 @@ COPY murdock_slave.sh /usr/bin/murdock_slave
 # create cache folder
 RUN mkdir -m777 /cache
 
+# set cache folder for Download Cache
+ENV DLCACHE_DIR /cache/.dlcache
+
 ENTRYPOINT ["/bin/bash", "/run.sh"]
 
 # By default, run a shell when no command is specified on the docker command line