diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index e861206ecc3..e676cf3132a 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 
 LABEL org.opencontainers.image.source="https://github.com/nextcloud/documentation"
 LABEL org.opencontainers.image.description="Sphinx build environment for Nextcloud documentation"
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 842d30e2828..af35e430e2d 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -25,3 +25,7 @@ updates:
     open-pull-requests-limit: 10
     cooldown:
       default-days: 10
+    ignore:
+      # Stick to Ubuntu LTS releases (even year, .04)
+      - dependency-name: "ubuntu"
+        versions: ["25.x", "26.10", "27.x", "28.10", "29.x"]