diff --git a/ci/openshift-ci/cluster/deploy_webhook.sh b/ci/openshift-ci/cluster/deploy_webhook.sh
index c0ea9e3d7d..0b732da695 100755
--- a/ci/openshift-ci/cluster/deploy_webhook.sh
+++ b/ci/openshift-ci/cluster/deploy_webhook.sh
@@ -23,14 +23,11 @@ pushd "${webhook_dir}" >/dev/null
 #
 info "Builds the kata-webhook"
 ./create-certs.sh
+info "Override our KATA_RUNTIME ConfigMap"
+sed -i deploy/webhook.yaml -e "s/runtime_class: .*$/runtime_class: $KATA_RUNTIME/g"
 info "Deploys the kata-webhook"
 oc apply -f deploy/
 
-info "Override our KATA_RUNTIME ConfigMap"
-RUNTIME_CLASS="${KATA_RUNTIME}" \
-	envsubst < "${script_dir}/deployments/configmap_kata-webhook.yaml.in" \
-	| oc apply -f -
-
 # Check the webhook was deployed and is working.
 RUNTIME_CLASS="${KATA_RUNTIME}" ./webhook-check.sh
 popd >/dev/null
diff --git a/ci/openshift-ci/cluster/deployments/configmap_kata-webhook.yaml.in b/ci/openshift-ci/cluster/deployments/configmap_kata-webhook.yaml.in
deleted file mode 100644
index 4c587cbe04..0000000000
--- a/ci/openshift-ci/cluster/deployments/configmap_kata-webhook.yaml.in
+++ /dev/null
@@ -1,12 +0,0 @@
-# Copyright (c) 2021 Red Hat, Inc.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-# Apply customizations to the kata-webhook.
-#
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: kata-webhook
-data:
-  runtime_class: ${RUNTIME_CLASS}