diff --git a/.github/workflows/build_documentation.yml b/.github/workflows/build_documentation.yml
index 1f05802b..93d552cf 100644
--- a/.github/workflows/build_documentation.yml
+++ b/.github/workflows/build_documentation.yml
@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Install nix
-        uses: cachix/install-nix-action@v30
+        uses: cachix/install-nix-action@v31
         with:
           nix_path: nixpkgs=channel:nixos-unstable
 
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 08e6934e..c29e0233 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -53,7 +53,7 @@ jobs:
           ssh-key: ${{ secrets.CI_UPDATE_SSH_KEY }}
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v30
+        uses: cachix/install-nix-action@v31
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           github_access_token: ${{ secrets.GITHUB_TOKEN }}