diff --git a/docker-compose.yml b/docker-compose.yml
index 4ff1d2a..156dd03 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,3 +1,8 @@
+# Explicit project name — without this, Compose derives it from the
+# directory basename, which can collide with an unrelated sibling repo
+# checked out under the same name on another host/path. Never omit this.
+name: top-tickets
+
 services:
   app:
     build: .