diff --git a/images/build/cross/cloudbuild.yaml b/images/build/cross/cloudbuild.yaml
index a11ddddcf02..e16147999a9 100644
--- a/images/build/cross/cloudbuild.yaml
+++ b/images/build/cross/cloudbuild.yaml
@@ -2,7 +2,7 @@
 timeout: 9000s
 
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
 
 steps:
   - name: 'gcr.io/k8s-staging-test-infra/gcb-docker-gcloud:v20210917-12df099d55'
diff --git a/images/build/debian-base/cloudbuild.yaml b/images/build/debian-base/cloudbuild.yaml
index 43bd646ae4c..0a372c6ea11 100644
--- a/images/build/debian-base/cloudbuild.yaml
+++ b/images/build/debian-base/cloudbuild.yaml
@@ -2,7 +2,7 @@
 timeout: 1200s
 
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
   machineType: 'N1_HIGHCPU_8'
 
 steps:
diff --git a/images/build/distroless-iptables/cloudbuild.yaml b/images/build/distroless-iptables/cloudbuild.yaml
index 8603ec11352..049e71f9fe4 100644
--- a/images/build/distroless-iptables/cloudbuild.yaml
+++ b/images/build/distroless-iptables/cloudbuild.yaml
@@ -2,7 +2,7 @@
 timeout: 7200s
 
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
   machineType: 'N1_HIGHCPU_8'
 
 steps:
diff --git a/images/build/go-runner/cloudbuild.yaml b/images/build/go-runner/cloudbuild.yaml
index acd9ced3017..1aeb5498e33 100644
--- a/images/build/go-runner/cloudbuild.yaml
+++ b/images/build/go-runner/cloudbuild.yaml
@@ -6,7 +6,7 @@ timeout: 3600s
 # this prevents errors if you don't use both _GIT_TAG and _PULL_BASE_REF,
 # or any new substitutions added in the future.
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
   machineType: 'N1_HIGHCPU_8'
 
 steps:
diff --git a/images/build/setcap/cloudbuild.yaml b/images/build/setcap/cloudbuild.yaml
index 1784ba1e9d4..75e1b4a227d 100644
--- a/images/build/setcap/cloudbuild.yaml
+++ b/images/build/setcap/cloudbuild.yaml
@@ -2,7 +2,7 @@
 timeout: 1200s
 
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
   machineType: 'N1_HIGHCPU_8'
 
 steps:
diff --git a/images/k8s-cloud-builder/cloudbuild.yaml b/images/k8s-cloud-builder/cloudbuild.yaml
index a8bd014f50a..7819f932132 100644
--- a/images/k8s-cloud-builder/cloudbuild.yaml
+++ b/images/k8s-cloud-builder/cloudbuild.yaml
@@ -1,7 +1,7 @@
 # See https://cloud.google.com/cloud-build/docs/build-config
 timeout: 1200s
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
 steps:
   - name: gcr.io/cloud-builders/docker
     id: build
diff --git a/images/releng/ci/cloudbuild.yaml b/images/releng/ci/cloudbuild.yaml
index ba19a88b297..45f47007e1d 100644
--- a/images/releng/ci/cloudbuild.yaml
+++ b/images/releng/ci/cloudbuild.yaml
@@ -2,7 +2,7 @@
 # See https://cloud.google.com/cloud-build/docs/build-config
 timeout: 1200s
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
 steps:
   - name: gcr.io/cloud-builders/docker
     dir: ./images/releng/ci
diff --git a/images/releng/k8s-ci-builder/cloudbuild.yaml b/images/releng/k8s-ci-builder/cloudbuild.yaml
index 44aebe2acf0..9467bbc68de 100644
--- a/images/releng/k8s-ci-builder/cloudbuild.yaml
+++ b/images/releng/k8s-ci-builder/cloudbuild.yaml
@@ -6,7 +6,7 @@ timeout: 1200s
 # this prevents errors if you don't use both _GIT_TAG and _PULL_BASE_REF,
 # or any new substitutions added in the future.
 options:
-  substitution_option: ALLOW_LOOSE
+  substitutionOption: ALLOW_LOOSE
   machineType: 'N1_HIGHCPU_8'
 
 steps: