diff --git a/.github/workflows/check_size.yaml b/.github/workflows/check_size.yaml
index dc685de..c418bf0 100644
--- a/.github/workflows/check_size.yaml
+++ b/.github/workflows/check_size.yaml
@@ -12,6 +12,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check large files
-        uses: ActionsDesk/lfs-warning@v2.0
+        uses: ActionsDesk/lfs-warning@1a3a74543c2cf92cc97aa1bad190a500bcb3829c  # v2.0
         with:
           filesizelimit: 10485760 # = 10MB, so we can sync to HF spaces
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