diff --git a/build/int.cloudbuild.yaml b/build/int.cloudbuild.yaml
index 3e0dcf17..a57cff72 100644
--- a/build/int.cloudbuild.yaml
+++ b/build/int.cloudbuild.yaml
@@ -66,7 +66,7 @@ tags:
 - 'integration'
 substitutions:
   _DOCKER_IMAGE_DEVELOPER_TOOLS: 'cft/developer-tools'
-  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1'
+  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.18'
 
 # Uncomment to specify the deployment region.
 # Resources default to 'us-central1' without a value assigned here.