diff --git a/internal/proxy/README.md b/internal/proxy/README.md
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-# Wire module proxy
-
-The Travis build for Wire uses a [Go module proxy][] for dependencies, for
-efficiency and reliability, and to enforce that all of our dependencies meet our
-license requirements.
-
-The proxy is set
-[here](https://github.com/google/wire/blob/master/.travis.yml#L48).
-
-[Go module proxy]: https://research.swtch.com/vgo-module
-
-## Updating the GCS bucket
-
-When you add a new dependency, the Travis build will fail. To add the new
-dependency to the proxy:
-
-1.  Ensure that the new dependency is covered under one of the `notice`,
-    `permissive`, or `unencumbered` licences under the categories defined by
-    [Google Open Source](https://opensource.google.com/docs/thirdparty/licenses/).
-2.  Gather the new set of dependencies and sync them to the GCS bucket.
-
-```bash
-# This approach was suggested by:
-# https://github.com/go-modules-by-example/index/tree/master/012_modvendor
-
-# Create a temporary directory where we'll create a module download cache.
-tgp="$(mktemp -d)"
-
-# Copy current module cache into temporary directory as basis.
-# Periodically, someone on the project should go through this process without
-# running this step to prune unused dependencies.
-mkdir -p "$tgp/pkg/mod/cache/download"
-gsutil -m rsync -r gs://wire-modules "$tgp/pkg/mod/cache/download"
-
-# Run this command in the master branch.
-# It runs "go mod download" in every module that we have in our repo,
-# filling the cache with all of the module dependencies we need.
-./internal/proxy/makeproxy.sh "$tgp"
-
-# Run the above command again in your branch that's adding a new dependency,
-# to ensure the cache has any new dependencies.
-
-# Move the temporary cache to modvendor/.
-rm -rf modvendor
-cp -rp "$tgp/pkg/mod/cache/download/" modvendor
-
-# Clean up the temporary cache.
-GOPATH="$tgp" go clean -modcache
-rm -rf "$tgp"
-unset tgp
-
-# Synchronize modvendor to the proxy.
-
-# -n: preview only
-# -r: recurse directories
-# -c: compare checksums not write times
-# -d: delete remote files that aren't present locally
-gsutil rsync -n -r -c -d modvendor gs://wire-modules
-# If the set of packages being added and removed looks good,
-# repeat without the -n.
-
-# Once you are done...
-rm -rf modvendor
-```
diff --git a/internal/proxy/makeproxy.sh b/internal/proxy/makeproxy.sh
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-#!/usr/bin/env bash
-# Copyright 2018 The Wire Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script downloads and arranges packages in a structure for a
-# Wire proxy.
-
-# https://coderwall.com/p/fkfaqq/safer-bash-scripts-with-set-euxo-pipefail
-set -euxo pipefail
-
-if [[ $# -ne 1 ]]; then
-  echo "usage: makeproxy.sh <dir>" 1>&2
-  exit 64
-fi
-
-export GOPATH="$1"
-root="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../.." >/dev/null && pwd )"
-cd "$root"
-go mod download