diff --git a/dnmetis/backend_C++/dnmetis_backend/README.md b/dnmetis/backend_C++/dnmetis_backend/README.md
index e49a92d..43f75e3 100644
--- a/dnmetis/backend_C++/dnmetis_backend/README.md
+++ b/dnmetis/backend_C++/dnmetis_backend/README.md
@@ -6,7 +6,7 @@
 
 1.install dnmetis_backend
 
-    1.python setup.py  install
+    1.python3.7.5 setup.py  install