diff --git a/docker-compose.yml b/docker-compose.yml
index 2e727ba..469163a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3.8"
-
 # Full NetEngine local bootstrap stack.
 # Services here start BEFORE `netengine up` runs.
 # CoreDNS and step-ca are deployed by phase handlers at runtime.
diff --git a/docs/compose-brainstorm.md b/docs/compose-brainstorm.md
index 98e3140..5b4a1b6 100644
--- a/docs/compose-brainstorm.md
+++ b/docs/compose-brainstorm.md
@@ -235,4 +235,4 @@ services:
 - [ ] Should we provide `compose.override.yml` as a git-ignored template?
 - [ ] Do we want dedicated profiles for: `debug`, `load-test`, `chaos`, `security`?
 - [ ] Should multi-world compose use separate networks or shared?
-- [ ] Should we version compose file format or stick to 3.8+?
+- [x] Omit the obsolete top-level Compose file `version` field and rely on the Compose Specification.