diff --git a/internal/gaby/deploy-cloud-run.sh b/internal/gaby/deploy-cloud-run.sh
index d4034e7..fd5c3f2 100755
--- a/internal/gaby/deploy-cloud-run.sh
+++ b/internal/gaby/deploy-cloud-run.sh
@@ -2,16 +2,9 @@
 
 set -e
 
-# This script deploys gaby to Cloud Run.
-# It takes a single argument, the Firestore database name, which
-# is also the suffix of the Cloud Run service name.
-#
-# Example:
-#
-#    deploy-cloud-run.sh devel
-#
 # This command builds a docker container for gaby that refers the Firestore "devel"
 # database, and deploys it as the Cloud Run service "gaby-devel".
+# It takes no arguments.
 #
 # The script requires the OSCAR_PROJECT environment variable to be set to the project
 # ID of the GCP project hosting Oscar.
@@ -19,10 +12,6 @@
 # The script passes false for both the -enablesync and -enablechanges flags to gaby.
 # Edit the script to pass true for one or both of them.
 #
-# You should avoid using this script to deploy to prod unless you know what you are doing.
-# And you should avoid deploying anywhere from a workspace with uncommitted files;
-# when debugging, it may be impossible to retrieve the exact source that produced the container.
-#
 # This script requires the following GCP permissions, and possibly others:
 #     Cloud Run Developer
 
@@ -31,16 +20,12 @@
 	exit 2
 fi
 
-firestore_db=$1
-case $firestore_db in
-  devel|prod);;
-  *)
-	echo >&2 "usage: $0 FIRESTORE_DB"
-	echo >&2 "       FIRESTORE_DB must be one of: devel, prod"
-	exit 2
-esac
+# Variables must be defined.
+set -u
 
-image=gcr.io/$OSCAR_PROJECT/gaby:$firestore_db
+region=us-central1
+
+image=gcr.io/$OSCAR_PROJECT/gaby:devel
 
 repo_root=$(git rev-parse --show-toplevel)
 
@@ -48,12 +33,13 @@
 
 docker build -f internal/gaby/Dockerfile \
 	-t $image \
-	--build-arg FIRESTORE_DB=$firestore_db \
+	--build-arg FIRESTORE_DB=devel \
 	--build-arg ENABLE_SYNC=false \
 	--build-arg ENABLE_CHANGES=false \
 	$repo_root
 
 docker push $image
 
-gcloud run deploy gaby-$firestore_db --image $image --quiet
+gcloud run deploy gaby-devel --image $image --region $region --quiet
+gcloud run services update-traffic gaby-devel --to-latest --region $region