diff --git a/podman_compose.py b/podman_compose.py
index db6dc58..3fdfe69 100755
--- a/podman_compose.py
+++ b/podman_compose.py
@@ -1979,7 +1979,7 @@ def _parse_compose_file(self):
 
             container_names_by_service[service_name] = []
             for num in range(1, replicas + 1):
-                name0 = f"{project_name}_{service_name}_{num}"
+                name0 = f"{project_name}-{service_name}-{num}"
                 if num == 1:
                     name = service_desc.get("container_name", name0)
                 else: