diff --git a/README.md b/README.md
index 90ea704..e7b4cc2 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ pip3 install git+https://code.smolnet.org/micke/knotctl
 ```
 To build and install as a deb-package
 ```
+sudo apt install python3-stdeb
 git clone https://code.smolnet.org/micke/knotctl
 cd knotctl
 python3 setup.py --command-packages=stdeb.command bdist_deb