diff --git a/.github/workflows/flatpak-builder.yml b/.github/workflows/flatpak-builder.yml
index ef7b192..feb6176 100644
--- a/.github/workflows/flatpak-builder.yml
+++ b/.github/workflows/flatpak-builder.yml
@@ -17,4 +17,5 @@ jobs:
         repository-name: gnome-nightly
         repository-url: https://nightly.gnome.org/gnome-nightly.flatpakrepo
         bundle: hu.kramo.Cartridges.flatpak
-        manifest-path: hu.kramo.Cartridges.json
\ No newline at end of file
+        manifest-path: hu.kramo.Cartridges.json
+        cache-key: flatpak-builder-${{ github.sha }}
\ No newline at end of file