diff --git a/Dockerfile b/Dockerfile
index 75f62ab..d023599 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,12 @@
 # from https://hub.docker.com/_/ubuntu/tags?page=1&name=22.04
 FROM ubuntu:22.04@sha256:965fbcae990b0467ed5657caceaec165018ef44a4d2d46c7cdea80a9dff0d1ea
 
-ENV ENV_GITHUB_RUNNER_VERSION="2.305.0"
-ENV ENV_GITHUB_RUNNER_VERSION_SHA=737bdcef6287a11672d6a5a752d70a7c96b4934de512b7eb283be6f51a563f2f
+# see readme to understand wich version and use to use
+ENV ENV_GITHUB_RUNNER_VERSION="2.308.0"
+ENV ENV_GITHUB_RUNNER_VERSION_SHA=9f994158d49c5af39f57a65bf1438cbae4968aec1e4fec132dd7992ad57c74fa
+# https://github.com/Azure/kubelogin/blob/master/CHANGELOG.md
+ENV ENV_KUBELOGIN_VERSION=0.0.31
 ENV ENV_YQ_VERSION="v4.30.6"
-ENV ENV_KUBELOGIN_VERSION=0.0.27
 
 WORKDIR /
 
diff --git a/README.md b/README.md
index 10ad6a6..822070b 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,16 @@
 # github-self-hosted-runner-azure
+
+## How to use
+
+Every time you want to update the runner you have to do the following:
+
+* go to the following page: <https://github.com/actions/runner/releases> and choose the latest runner
+* on the page of the chosen release, you need to take two pieces of info:
+
+  * the version of the runner
+
+  * the sha of the `actions-runner-linux-x64` version these two info must be inserted in the Dockerfile respectively in the variable: `ENV_GITHUB_RUNNER_VERSION` and `ENV_GITHUB_RUNNER_VERSION_SHA`
+
+* run a local build
+
+* Push your code and be sure that the action `beta-docker-branch` runs correctly