diff --git a/CHANGELOG.md b/CHANGELOG.md
index fda598e..1be561e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Migrate from the `lang-python` S3 bucket to `heroku-buildpack-python` (#1089).
 - Remove `vendor/shunit2` (#1086).
 - Replace `BUILDPACK_VENDOR_URL` and `USE_STAGING_BINARIES` with `BUILDPACK_S3_BASE_URL` (#1085).
 
diff --git a/bin/compile b/bin/compile
index 11422f6..8c356d7 100755
--- a/bin/compile
+++ b/bin/compile
@@ -41,7 +41,12 @@ export BUILD_DIR CACHE_DIR ENV_DIR
 # The user can provide BUILDPACK_S3_BASE_URL to specify a custom target.
 # Note: this is designed for non-Heroku use, as it does not use the user-provided
 # environment variable mechanism (the ENV_DIR).
-DEFAULT_S3_BASE_URL='https://lang-python.s3.amazonaws.com'
+if [[ "${STACK}" == "cedar-14" ]]; then
+  # Since Cedar-14 is EOL on 2020-11-02 it's not worth migrating it to the new bucket.
+  DEFAULT_S3_BASE_URL='https://lang-python.s3.amazonaws.com'
+else
+  DEFAULT_S3_BASE_URL='https://heroku-buildpack-python.s3.amazonaws.com'
+fi
 S3_BASE_URL="${BUILDPACK_S3_BASE_URL:-${DEFAULT_S3_BASE_URL}}"
 # This has to be exported since it's used by the geo-libs step which is run in a subshell.
 # TODO: Stop exporting once the geo-libs step is removed or no longer uses `sub_env`.
diff --git a/builds/heroku-16.Dockerfile b/builds/heroku-16.Dockerfile
index c9b2bdf..cd19b57 100644
--- a/builds/heroku-16.Dockerfile
+++ b/builds/heroku-16.Dockerfile
@@ -1,7 +1,7 @@
 FROM heroku/heroku:16-build
 
 ENV WORKSPACE_DIR="/app/builds" \
-    S3_BUCKET="lang-python" \
+    S3_BUCKET="heroku-buildpack-python" \
     S3_PREFIX="heroku-16/" \
     STACK="heroku-16"
 
diff --git a/builds/heroku-18.Dockerfile b/builds/heroku-18.Dockerfile
index edcc11d..ab992b0 100644
--- a/builds/heroku-18.Dockerfile
+++ b/builds/heroku-18.Dockerfile
@@ -1,7 +1,7 @@
 FROM heroku/heroku:18-build
 
 ENV WORKSPACE_DIR="/app/builds" \
-    S3_BUCKET="lang-python" \
+    S3_BUCKET="heroku-buildpack-python" \
     S3_PREFIX="heroku-18/" \
     STACK="heroku-18"