diff --git a/tools/install-gcloud.sh b/tools/install-gcloud.sh
index 9ce6738..12dd610 100755
--- a/tools/install-gcloud.sh
+++ b/tools/install-gcloud.sh
@@ -7,7 +7,7 @@ set -eux; \
       tee -a /etc/apt/sources.list.d/google-cloud-sdk.list && \
     curl https://packages.cloud.google.com/apt/doc/apt-key.gpg |
       apt-key --keyring /usr/share/keyrings/cloud.google.gpg  add - && \
-    export GCLOUD_CLI_VERSION=${GCLOUD_SDK_VERSION:-467.0.0-0} && \
-    export GCLOUD_AUTH_VERSION=${GCLOUD_AUTH_VERSION:-467.0.0-0} && \
+    export GCLOUD_CLI_VERSION=${GCLOUD_SDK_VERSION:-420.0.0-0} && \
+    export GCLOUD_AUTH_VERSION=${GCLOUD_AUTH_VERSION:-420.0.0-0} && \
     apt-get update -y && apt-get install google-cloud-sdk=${GCLOUD_CLI_VERSION} -y && \
     apt-get update -y && apt-get install google-cloud-cli-gke-gcloud-auth-plugin=${GCLOUD_AUTH_VERSION} -y