diff --git a/wazuh-opendistro/config/etc/cont-init.d/0-wazuh-init b/wazuh-opendistro/config/etc/cont-init.d/0-wazuh-init
index 0a625354..68538c10 100644
--- a/wazuh-opendistro/config/etc/cont-init.d/0-wazuh-init
+++ b/wazuh-opendistro/config/etc/cont-init.d/0-wazuh-init
@@ -133,6 +133,19 @@ set_custom_hostname() {
   sed -i 's/<node_name>to_be_replaced_by_hostname<\/node_name>/<node_name>'"${HOSTNAME}"'<\/node_name>/g' ${WAZUH_INSTALL_PATH}/etc/ossec.conf
 }
 
+##############################################################################
+# Allow users to set the container cluster key dynamically on
+# container start.
+#
+# To use this:
+# 1. Create your own ossec.conf file
+# 2. In your ossec.conf file, set to_be_replaced_by_cluster_key as your key
+# 3. Mount your custom ossec.conf file at $WAZUH_CONFIG_MOUNT/etc/ossec.conf
+##############################################################################
+
+set_custom_cluster_key() {
+  sed -i 's/<key>to_be_replaced_by_cluster_key<\/key>/<key>'"${WAZUH_CLUSTER_KEY}"'<\/key>/g' ${WAZUH_INSTALL_PATH}/etc/ossec.conf
+}
 
 ##############################################################################
 # Main function
@@ -163,6 +176,9 @@ main() {
   # Allow setting custom hostname
   set_custom_hostname
 
+  # Allow setting custom cluster key
+  set_custom_cluster_key
+
   # Delete temporary data folder
   rm -rf ${WAZUH_INSTALL_PATH}/data_tmp