diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index c527f3d..c838715 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -66,6 +66,16 @@ main:
 	.data
 message:
 	.string "Hello, world!\\n"
+`,
+  },
+  asciidoc: {
+    aliases: ["adoc", "asc"],
+    monacoLang: "plaintext",
+    name: "AsciiDoc",
+    main: "main.adoc",
+    compile: "asciidoc -s main.adoc",
+    run: "prettier --no-config main.html",
+    template: `Hello, world!
 `,
   },
   ats: {
diff --git a/scripts/docker-install-phase3a.bash b/scripts/docker-install-phase3a.bash
index a0575c3..c64d750 100755
--- a/scripts/docker-install-phase3a.bash
+++ b/scripts/docker-install-phase3a.bash
@@ -16,6 +16,9 @@ algol68g
 gcc-arm-linux-gnueabihf
 qemu-user-static
 
+# AsciiDoc
+asciidoc
+
 # ATS
 ats2-lang