diff --git a/playbook.yml b/playbook.yml
index a2577f4..e5db09d 100644
--- a/playbook.yml
+++ b/playbook.yml
@@ -11,4 +11,6 @@
     - { role: base-image, version: "5.0.0", user_name: opam, zfs_pool: "obuilder" , default: false }
     - { role: base-image, version: "5.1.1", user_name: opam, zfs_pool: "obuilder" , default: false }
     - { role: base-image, version: "5.2.0", user_name: opam, zfs_pool: "obuilder" , default: true }
+    - { role: base-image, version: "5.3.0~alpha1", user_name: opam, zfs_pool: "obuilder" , default: false }
+    - { role: base-image, version: "5.4.0+trunk", user_name: opam, zfs_pool: "obuilder" , default: false }
 
diff --git a/roles/base-image/tasks/main.yml b/roles/base-image/tasks/main.yml
index b47f96e..d93aa97 100644
--- a/roles/base-image/tasks/main.yml
+++ b/roles/base-image/tasks/main.yml
@@ -68,7 +68,7 @@
       git config --global user.name "Your Name"
       curl -s https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh -o install.sh
       chmod +x install.sh
-      for version in 2.1.5 2.2.0 dev ; do
+      for version in 2.1.6 2.2.1 dev ; do
         if [ "$version" = "dev" ] ; then
           ./install.sh --dev --download-only
         else