diff --git a/run.go b/run.go
index aa169f6..1c658aa 100644
--- a/run.go
+++ b/run.go
@@ -10,7 +10,7 @@ import (
 	"path/filepath"
 )
 
-func runMap(conn net.Conn, instance string, objmap map[string]string) (int, error) {
+func runMap(conn net.Conn, instance string, objmap map[string]interface{}) (int, error) {
 	program, has := objmap["package"]
 	if !has {
 		return 0, errors.New("a package is required")
@@ -27,7 +27,7 @@ func runMap(conn net.Conn, instance string, objmap map[string]string) (int, erro
 	if !has {
 		return 0, errors.New("a workdir is required")
 	}
-	return run(conn, instance, program, arguments, target, workdir)
+	return run(conn, instance, program.(string), arguments.(string), target.(string), workdir.(string))
 }
 
 func run(conn net.Conn, instance string, program string, arguments string, target string, workdir string) (int, error) {