diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index 6eef79b..8e48e85 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -59,7 +59,7 @@ jobs:
 
       # Nix drives the formatting check, so install it unconditionally.
       - name: Install Nix
-        uses: cachix/install-nix-action@a49548c11d9846ad46ecc0115273879b045f001c # v31
+        uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes