diff --git a/.github/workflows/update_flake.yml b/.github/workflows/update_flake.yml
index 7fc29fe..ca9572a 100644
--- a/.github/workflows/update_flake.yml
+++ b/.github/workflows/update_flake.yml
@@ -15,6 +15,6 @@ jobs:
         uses: cachix/install-nix-action@v16
         
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v8
+        uses: DeterminateSystems/update-flake-lock@v9
         with:
           pr-title: "Update flake.lock" # Title of PR to be created