diff --git a/docs/development/setup.md b/docs/development/setup.md
index 3fc8792b6..d6f9c5e5c 100644
--- a/docs/development/setup.md
+++ b/docs/development/setup.md
@@ -17,6 +17,14 @@ git clone git@github.com:onmetal/onmetal-api.git
 cd onmetal-api
 ```
 
+## Install cert-manager
+
+If there is no [cert-manager](https://cert-manager.io/docs/) present in the cluster it needs to be installed.
+
+```shell
+kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.8.0/cert-manager.yaml
+```
+
 ## Install APIs into the Cluster
 
 Your Kubernetes API server needs to know about the APIs which come with the `onmetal-api` project. To install the APIs
@@ -34,6 +42,9 @@ the manifests is available via
 make kind-install
 ```
 
+**Note**: In case that there are multiple environments running, ensure that `kind get clusters` is pointing to the
+default kind cluster.
+
 ## Start the Controller Manager
 
 The controller manager can be started via the following command