diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index a421e95..459ef78 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -149,8 +149,9 @@ jobs:
         git push origin --delete nightly || true
         git tag nightly
         git push origin nightly
+        curl -L -o old.asar "https://github.com/GooseMod/OpenAsar/releases/download/nightly/app.asar"
         gh release delete ${{ env.VERSION }} -y || true
-        gh release create ${{ env.VERSION }} -t "Nightly" -n "$(git rev-parse HEAD | cut -c 1-7) | $(git log -1 --pretty=%B)" ${{ env.FILES }}
+        gh release create ${{ env.VERSION }} -t "Nightly" -n "$(bash scripts/nightlyNotes.sh)" ${{ env.FILES }}
       env:
         GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
         VERSION: 'nightly'
diff --git a/scripts/nightlyNotes.sh b/scripts/nightlyNotes.sh
new file mode 100644
index 0000000..c9fd935
--- /dev/null
+++ b/scripts/nightlyNotes.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+echo "$(git rev-parse HEAD | cut -c 1-7) | $(git log -1 --pretty=%B)"
+
+size_old=$(stat -c "%s" old.asar)
+size_new=$(stat -c "%s" app.asar)
+
+echo "print(\"%+2.3f KB\" % (($size_new-$size_old)/1000))" | python3
\ No newline at end of file