diff --git a/README.md b/README.md
index 294e72e..b76c9a5 100644
--- a/README.md
+++ b/README.md
@@ -46,9 +46,12 @@ imagebuilder
 |TAG | A tag that is added to the name|
 |RAW_OUTPOUT | Set to yes to get the .img file as output|
 |TOKEN | A token used by Ansible|
+|VAULT_KEY | Key to use in the vaultkey.secret file|
 
 ### List of flavors
 
+ubuntu24.04
+
 ubuntu22.04
 
 ubuntu20.04
@@ -69,8 +72,8 @@ Run mount command. Make sure to update the offset (526336) for the correct value
 `mount ubuntu-22.04.4-preinstalled-server-arm64+raspi.img -o loop,offset=$(( 512 * 526336)) /mnt/`
 
 ## How to add my custom secrets file for ansible vaults?
-Copy the file in `out/output`. and make sure that the name is NODENAME-vaultkey.secret
 
+To use a custom secret the VAULT_KEY variable can be set. If a vaultkey file of the name NODENAME-vaultkey.secret already exists the variable will be ignored.
 
 [![GitHub](https://img.shields.io/github/license/ERIGrid2/riasc-provisioning)](https://github.com/ERIGrid2/riasc-provisioning/blob/master/LICENSE)
 
diff --git a/rpi/create_image.sh b/rpi/create_image.sh
index 6c2b814..8c94d5c 100755
--- a/rpi/create_image.sh
+++ b/rpi/create_image.sh
@@ -86,6 +86,9 @@ echo "Using token: ${TOKEN}"
 echo "Using flavor: ${FLAVOR}"
 echo "Using repo: ${GIT_URL}"
 echo "Using branch: ${GIT_BRANCH}"
+if [! -z "$VAULT_KEY" ]; then
+	echo "Using ansible secret ${VAULT_KEY}"
+fi
 
 # Check that required commands exist
 echo "Check if required commands are installed..."
@@ -166,8 +169,10 @@ sed -i \
 
 #Generate ansible secret
 if [ ! -f ${OUTPUT_FOLDER}/"${NODENAME}"-vaultkey.secret ]; then
-	echo "Generate ansible secret"
-	VAULT_KEY=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 20; echo)
+	if [ -z "$VAULT_KEY" ]; then
+		echo "Generate ansible secret"
+		VAULT_KEY=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 20; echo)
+	fi
 cat <<EOF > ${OUTPUT_FOLDER}/"${NODENAME}"-vaultkey.secret
 #!/bin/bash
 echo "${VAULT_KEY}"