diff --git a/gpu-dawn/dev/bundle-release.sh b/gpu-dawn/dev/bundle-release.sh
index 3a519bc3..2e413142 100755
--- a/gpu-dawn/dev/bundle-release.sh
+++ b/gpu-dawn/dev/bundle-release.sh
@@ -13,7 +13,7 @@ zig version > out/ZIG_VERSION
 
 # Bundle headers.json.gz
 pushd out
-python ../dev/dir_to_json.py > ../headers.json
+python3 ../dev/dir_to_json.py > ../headers.json
 popd
 gzip -9 headers.json