diff --git a/.github/workflows/build_nix.yml b/.github/workflows/build_nix.yml
index 27263fb..c23cfd4 100644
--- a/.github/workflows/build_nix.yml
+++ b/.github/workflows/build_nix.yml
@@ -24,7 +24,7 @@ jobs:
       - name: Install Nix
         uses: cachix/install-nix-action@v26
 
-      - uses: cachix/cachix-action@v12
+      - uses: cachix/cachix-action@v15
         with:
           name: espresso-systems-private
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
diff --git a/.github/workflows/update_nix.yml b/.github/workflows/update_nix.yml
index a69c403..0be68b4 100644
--- a/.github/workflows/update_nix.yml
+++ b/.github/workflows/update_nix.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Install Nix
         uses: cachix/install-nix-action@v26
 
-      - uses: cachix/cachix-action@v14
+      - uses: cachix/cachix-action@v15
         with:
           name: espresso-systems-private
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'