diff --git a/build/int.cloudbuild.yaml b/build/int.cloudbuild.yaml
index 65b8aea..f4f53dd 100644
--- a/build/int.cloudbuild.yaml
+++ b/build/int.cloudbuild.yaml
@@ -38,4 +38,4 @@ tags:
 - 'integration'
 substitutions:
   _DOCKER_IMAGE_DEVELOPER_TOOLS: 'cft/developer-tools'
-  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.20'
+  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.21'