diff --git a/README.md b/README.md
index 0a95e0a9707aeb67627218a9e94e43c2f022e394..d59b7acfdcb213350488f20e6c7d1be8e34bb34e 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,9 @@ This command fetch sources from gitlab and build them.
   cd cellframe-sdk
   git submodule update --init
   cd ../
+  cd cellframe-sdk-python
+  git submodule update --init
+  cd ../
   ```
 
 #### Build cellframe using cmake framework