diff --git a/documentation/tools/build-docs-container b/documentation/tools/build-docs-container
index f2f54044c..3909839d7 100755
--- a/documentation/tools/build-docs-container
+++ b/documentation/tools/build-docs-container
@@ -50,6 +50,7 @@ $0 OCI_IMAGE [make arguments...]
      - ubuntu:24.04
      - ubuntu:25.04
      - ubuntu:25.10
+     - ubuntu:26.04
 
    [make arguments] is one or more argument to pass to the make command of
    documentation/Makefile, see that file for what's supported. This is typically
@@ -147,7 +148,8 @@ main ()
     "ubuntu:22.04"*|\
     "ubuntu:24.04"*|\
     "ubuntu:25.04"*|\
-    "ubuntu:25.10"*)
+    "ubuntu:25.10"*|\
+    "ubuntu:26.04"*)
       containerfile=Containerfile.ubuntu
       essential=ubuntu_essential.sh
       docs=ubuntu_docs.sh