diff --git a/dockerfiles/k8s-app-deployer/Dockerfile b/dockerfiles/k8s-app-deployer/Dockerfile
index 68fe1e72b..80a14239e 100644
--- a/dockerfiles/k8s-app-deployer/Dockerfile
+++ b/dockerfiles/k8s-app-deployer/Dockerfile
@@ -3,7 +3,7 @@
 
 # For deploying apps onto Kubernetes clusters (including GKE)
 
-FROM google/cloud-sdk:529.0.0-slim
+FROM google/cloud-sdk:531.0.0-slim
 
 # Install apache2-utils (for htpasswd to bcrypt passwords for the
 # local-user-authenticator) and jq.