diff --git a/contrib/pyln-client/README.md b/contrib/pyln-client/README.md
index 0a16c4d98ef1..38fba5aa05cb 100644
--- a/contrib/pyln-client/README.md
+++ b/contrib/pyln-client/README.md
@@ -21,7 +21,7 @@ installing into your python3 environment:
 ```bash
 git clone https://github.com/ElementsProject/lightning.git
 cd lightning/contrib/pyln-client
-python3 setup.py develop
+poetry install
 ```
 
 This will add links to the library into your environment so changing the
diff --git a/contrib/pyln-proto/README.md b/contrib/pyln-proto/README.md
index a01bc77442bc..8914b3226b2c 100644
--- a/contrib/pyln-proto/README.md
+++ b/contrib/pyln-proto/README.md
@@ -21,7 +21,7 @@ installing into your python3 environment:
 ```bash
 git clone https://github.com/ElementsProject/lightning.git
 cd lightning/contrib/pyln-proto
-python3 setup.py develop
+poetry install
 ```
 
 This will add links to the library into your environment so changing the
diff --git a/contrib/pyln-testing/README.md b/contrib/pyln-testing/README.md
index 7ddc98149f74..469dc33a57ba 100644
--- a/contrib/pyln-testing/README.md
+++ b/contrib/pyln-testing/README.md
@@ -23,7 +23,7 @@ installing into your python3 environment:
 ```bash
 git clone https://github.com/ElementsProject/lightning.git
 cd lightning/contrib/pyln-testing
-python3 setup.py develop
+poetry install
 ```
 
 This will add links to the library into your environment so changing the