diff --git a/README.md b/README.md
index 9042c0ead..803e1de0f 100644
--- a/README.md
+++ b/README.md
@@ -124,6 +124,7 @@ This will produce a `build-win32` directory with the build products. Replace `mg
 - mgba/ubuntu:xenial
 - mgba/ubuntu:bionic
 - mgba/ubuntu:cosmic
+- mgba/ubuntu:disco
 - mgba/vita
 - mgba/wii
 - mgba/windows:w32
diff --git a/README_DE.md b/README_DE.md
index 172b5f826..8a1fae9ed 100644
--- a/README_DE.md
+++ b/README_DE.md
@@ -124,6 +124,7 @@ Dieser Befehl erzeugt ein Verzeichnis `build-win32` mit den erzeugten Programmda
 - mgba/ubuntu:xenial
 - mgba/ubuntu:bionic
 - mgba/ubuntu:cosmic
+- mgba/ubuntu:disco
 - mgba/vita
 - mgba/wii
 - mgba/windows:w32