diff --git a/locals.tf b/locals.tf
index 6f189b9..9446966 100644
--- a/locals.tf
+++ b/locals.tf
@@ -16,6 +16,7 @@ locals {
   provisioner_environment = merge(var.extra_provisioner_environment_variables, local.provisioner_environment_variables)     // The full set of environment variables passed to the provisioning script.
   provisioner_environment_variables = {                                                                                     // The set of environment variables set by this module on the provisioning script.
     CILIUM_HELM_CHART            = var.cilium_helm_chart,                                                                   // The Cilium Helm chart to deploy.
+    CILIUM_HELM_EXTRA_ARGS       = var.cilium_helm_extra_args                                                               // Extra arguments to be passed to the 'helm upgrade --install' command that installs Cilium.
     CILIUM_HELM_RELEASE_NAME     = var.cilium_helm_release_name,                                                            // The name to use for the Cilium Helm release.
     CILIUM_HELM_VALUES_FILE      = var.cilium_helm_values_file_path,                                                        // The path to the Helm values file to use when installing Cilium.
     CILIUM_HELM_VERSION          = var.cilium_helm_version,                                                                 // The version of the Cilium Helm chart to deploy.
diff --git a/scripts/provisioner.sh b/scripts/provisioner.sh
index a582ccc..d367ae3 100755
--- a/scripts/provisioner.sh
+++ b/scripts/provisioner.sh
@@ -81,7 +81,7 @@ helm repo update
 # Replace variables in the values file and pipe it to 'helm upgrade --install'.
 envsubst < "${CILIUM_HELM_VALUES_FILE}" | \
   helm upgrade --install "${CILIUM_HELM_RELEASE_NAME}" "${CILIUM_HELM_CHART}" \
-    --version "${CILIUM_HELM_VERSION}" -n "${CILIUM_NAMESPACE}" -f /dev/stdin
+    --version "${CILIUM_HELM_VERSION}" -n "${CILIUM_NAMESPACE}" -f /dev/stdin ${CILIUM_HELM_EXTRA_ARGS}
 
 # Run any post-install script we may have been provided with.
 if [[ "${POST_CILIUM_INSTALL_SCRIPT}" != "" ]];
diff --git a/variables.tf b/variables.tf
index 03d7ff6..d227ba1 100644
--- a/variables.tf
+++ b/variables.tf
@@ -18,6 +18,12 @@ variable "cilium_helm_chart" {
   type        = string
 }
 
+variable "cilium_helm_extra_args" {
+  default     = ""
+  description = "Extra arguments to be passed to the 'helm upgrade --install' command that installs Cilium."
+  type        = string
+}
+
 variable "cilium_helm_release_name" {
   default     = "cilium"
   description = "The name of the Helm release to use for Cilium."