diff --git a/internal/config/builder.go b/internal/config/builder.go
index b9c0e75..35f0056 100644
--- a/internal/config/builder.go
+++ b/internal/config/builder.go
@@ -21,7 +21,10 @@ type Builder struct {
 
 func NewBuilder() *Builder {
 	return &Builder{
-		binds: map[string]string{},
+		binds: map[string]string{
+			"ship.start_block_num": "start-block",
+			"ship.end_block_num":   "end-block",
+		},
 	}
 }