diff --git a/.github/workflows/build_wheel.yml b/.github/workflows/build_wheel.yml
index b00e297..f9291f0 100644
--- a/.github/workflows/build_wheel.yml
+++ b/.github/workflows/build_wheel.yml
@@ -35,3 +35,7 @@ jobs:
         python3 -m build --outdir=dist --wheel
         python3 -m pip install --no-index --find-links=dist pypff-stubs
         mypy --strict -c 'import pypff; reveal_type(pypff.file)'
+    - name: Upload wheels
+      run: |
+        ./upload-wheel.sh dist/libpff_python*.whl
+        ./upload-wheel.sh stubs/dist/pypff_stubs*.whl
diff --git a/upload-wheel.sh b/upload-wheel.sh
new file mode 100755
index 0000000..b38acd6
--- /dev/null
+++ b/upload-wheel.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -euo pipefail
+
+wheel="$1"
+url="s3://everlaw-build-artifacts/libpff/$(basename "$wheel")"
+
+if aws s3 ls "$url" &>/dev/null; then
+    >&2 echo "$url already exists!"
+    exit 0
+fi
+
+aws s3 cp --only-show-errors "$wheel" "$url"
+>&2 echo "Uploaded $url"