diff --git a/.github/workflows/micropython.yml b/.github/workflows/micropython.yml
index 1d5a1bd..1eff459 100644
--- a/.github/workflows/micropython.yml
+++ b/.github/workflows/micropython.yml
@@ -95,7 +95,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         repository: gadgetoid/dir2uf2
-        ref: v0.0.8
+        ref: feature/no-uf2-padding
         path: dir2uf2
 
     - name: "MicroPython: Build MPY Cross"
@@ -125,7 +125,7 @@ jobs:
       shell: bash
       run: |
         python3 -m pip install littlefs-python==0.12.0
-        ./dir2uf2/dir2uf2 --fs-compact --append-to build-${{ matrix.name }}/${{ env.RELEASE_FILE }}.uf2 --manifest ${{env.USER_FS_MANIFEST}} --filename with-filesystem.uf2 ${{env.USER_FS_SOURCE}}/
+        ./dir2uf2/dir2uf2 --fs-compact --sparse --append-to build-${{ matrix.name }}/${{ env.RELEASE_FILE }}.uf2 --manifest ${{env.USER_FS_MANIFEST}} --filename with-filesystem.uf2 ${{env.USER_FS_SOURCE}}/
 
     - name: "Artifacts: Upload .uf2"
       uses: actions/upload-artifact@v4