diff --git a/tools/release.sh b/tools/release.sh
index 78babcff2..00c986534 100755
--- a/tools/release.sh
+++ b/tools/release.sh
@@ -216,6 +216,8 @@ echo twine upload "$root/dist.$version/*/*"
 
 if [ "$RELEASE_BRANCH" = candidate-"$version" ] ; then
     SetVersion "$nextversion".dev0
+    letsencrypt-auto-source/build.py
+    git add letsencrypt-auto-source/letsencrypt-auto
     git diff
     git commit -m "Bump version to $nextversion"
 fi