diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3ec3cdb809bec60859e46fc55f8b01a3f7a59d34..a704805c3acc796133cb137e483827e7ec3a05fb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -33,7 +33,7 @@ build-zynthbox-image-armhf:
     # Setup Zynthbox Repo sourceline
     - echo "# Setup Zynthbox Repo sourceline"
     - echo "ZYNTHIANOS_ZYNTHBOX_REPO_KEY_URL='https://repo.zynthbox.io/repo_key.pub'" >> ZynthianOS/src/modules/zynthianos/config
-    - echo "ZYNTHIANOS_ZYNTHBOX_REPO_SOURCELINE='deb http://repo.zynthbox.io/testing buster main'" >> ZynthianOS/src/modules/zynthianos/config
+    - echo "ZYNTHIANOS_ZYNTHBOX_REPO_SOURCELINE='deb http://repo.zynthbox.io/testing-bullseye bullseye main'" >> ZynthianOS/src/modules/zynthianos/config
 
     # Download prebuilt realtime kernel
     - echo "# Download prebuilt realtime kernel"