diff --git a/.github/workflows/cachix.yml b/.github/workflows/cachix.yml
index 8adbe08..d448e5c 100644
--- a/.github/workflows/cachix.yml
+++ b/.github/workflows/cachix.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Nix
-        uses: cachix/install-nix-action@v27
+        uses: cachix/install-nix-action@v31
 
       - name: Authenticate with Cachix
         uses: cachix/cachix-action@v15
diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 09442f7..6d06464 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Nix
-        uses: cachix/install-nix-action@v27
+        uses: cachix/install-nix-action@v31
 
       - name: Update flake
         run: nix flake update