diff --git a/docker-compose.yml b/docker-compose.yml
index b2796b2..1c111d8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -302,7 +302,10 @@ services:
       context: ./timetable-solver-service
       dockerfile: Dockerfile
     container_name: bp-lehrer-timetable-solver
-    platform: linux/arm64
+    # timefold-solver only ships x86_64 wheels — emulate via Rosetta on
+    # the ARM Mac Mini. Cloud target (memory says cloud OK for this svc)
+    # would be linux/amd64 native.
+    platform: linux/amd64
     ports:
       - "8095:8095"
     environment: