diff --git a/Makefile b/Makefile
index 5b17a5a5e..552729d2a 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@
 # Make will use bash instead of sh
 SHELL := /usr/bin/env bash
 
-DOCKER_TAG_VERSION_DEVELOPER_TOOLS := 1.20
+DOCKER_TAG_VERSION_DEVELOPER_TOOLS := 1.21
 DOCKER_IMAGE_DEVELOPER_TOOLS := cft/developer-tools
 REGISTRY_URL := gcr.io/cloud-foundation-cicd
 
diff --git a/build/int.cloudbuild.yaml b/build/int.cloudbuild.yaml
index 3d5d1a913..13dbd628c 100644
--- a/build/int.cloudbuild.yaml
+++ b/build/int.cloudbuild.yaml
@@ -175,4 +175,4 @@ options:
   - 'TF_IN_AUTOMATION=true'
 substitutions:
   _DOCKER_IMAGE_DEVELOPER_TOOLS: 'cft/developer-tools'
-  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.20'
+  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.21'
diff --git a/build/lint.cloudbuild.yaml b/build/lint.cloudbuild.yaml
index 526154da2..07abf8be0 100644
--- a/build/lint.cloudbuild.yaml
+++ b/build/lint.cloudbuild.yaml
@@ -24,7 +24,7 @@ tags:
 - 'lint'
 substitutions:
   _DOCKER_IMAGE_DEVELOPER_TOOLS: 'cft/developer-tools'
-  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.20'
+  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.21'
 options:
   machineType: 'N1_HIGHCPU_8'
   env: