diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index c8e39c0..084f483 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@v4
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v19
+        uses: DeterminateSystems/update-flake-lock@v20
         with:
           pr-title: "Update flake.lock"
           # https://github.com/DeterminateSystems/update-flake-lock#with-a-personal-authentication-token