diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b80961d..f789530 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: DeterminateSystems/nix-installer-action@v14
+    - uses: DeterminateSystems/nix-installer-action@v15
     - uses: cachix/cachix-action@v15
       with:
         name: otavio-nix-config
@@ -36,7 +36,7 @@ jobs:
           - poirot
     steps:
     - uses: actions/checkout@v4
-    - uses: DeterminateSystems/nix-installer-action@v14
+    - uses: DeterminateSystems/nix-installer-action@v15
     - uses: cachix/cachix-action@v15
       with:
         name: otavio-nix-config
@@ -54,7 +54,7 @@ jobs:
           - "otavio@generic-x86"
     steps:
     - uses: actions/checkout@v4
-    - uses: DeterminateSystems/nix-installer-action@v14
+    - uses: DeterminateSystems/nix-installer-action@v15
     - uses: cachix/cachix-action@v15
       with:
         name: otavio-nix-config
diff --git a/.github/workflows/update-flake.yaml b/.github/workflows/update-flake.yaml
index 5045c24..3d20d35 100644
--- a/.github/workflows/update-flake.yaml
+++ b/.github/workflows/update-flake.yaml
@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v14
+        uses: DeterminateSystems/nix-installer-action@v15
       - name: Update flake.lock
         uses: DeterminateSystems/update-flake-lock@v24
         with: